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MEMBERS OF THE SOCIETY December, 1922

[Life members are designated by *]

ACKERMAN-TETJBNER, Dr. B. G. A. B. G. Teubner, Leipzig, Germany. ADAMS, Dr. C. R. Travelling Fellow, Harvard Univ. Pensione Girardet, Piazza

Esquilino, Rome, Italy. ADAMS, Prof. E. P. Princeton Univ., Princeton, N. J. ADAMS, Dr. 0. S. U. S. Coast and Geodetic Survey, Washington, D. C. 325 1th

St., N. E. ADAMS, Dr. RACHEL B. (Mrs. C. R.). 14 Mishawum Rd., Woburn, Mass. AGARD, Asst. Prof. H. L. Williams Coll., Williamstown, Mass. AKERS, Prof. O.P. Allegheny Coll., Meadville, Pa. 360 N. Main St. AKIMOFF, N. W. Engineer. Harrison Building, Philadelphia, Pa. ALBERT, Asst. Prof. O. W. Grinnell Coll., Grinnell, la. 1027 Summer St. ALDERTON, Asst. Prof. NINA M. Mills Coll., Mills College, Calif. ALEXANDER, Asst. Prof. J. W. Princeton Univ., Princeton, N. J. 29 Cleveland

Lane. ALEY, Pres. R. J. Butler Coll., Indianapolis, Ind. ALGER, P. L. General Electric Co., Schenectady, N. Y. 305 Rosa Rd. ALLARDICE, Prof. R. E. Stanford Univ., Stanford University, Calif. ALLEN, Prof. D. R. Univ. of Utah, Salt Lake City, Utah. 263 Elizabeth St. ALLEN, E. F. Instr., Univ. of Missouri, Columbia, Mo. 210 Engineering Bldg. ALLEN, Asso. Prof. E. S. Iowa State Coll., Ames, la. ALLEN, Dr. FLORENCE E. Instr., Univ of Wisconsin, Madison, Wis. 219 Lathrop

St. ALLEN, Asso. Prof. JOSEPH. Coll. of the City of New York, New York, N. Y. ALLEN, Prof. R. B. Kenyon Coll., Gambier, O. AMMERMAN, CHARLES. McKinley High School, St. Louis, Mo. Big Bend and

Sappington Rd., Eirkwood, Mo. ANDERSON, L. A. Central Life Assurance Society, Des Moines, la. ANDREWS, Dr. ANNE D. B. Associate, Univ. of California, Berkeley, Calif. 420

Wheeler Hall. *ARCHIBALD, ASSO. Prof. R. C. Brown Univ., Providence, R. I. 9 Charles Field St. ARMS, Prof. R. A. Gettysburg Coll., Gettysburg, Pa. 143 Springs Ave. ARMSTRONG, Dr. BEULAH M. Instr., Univ. of Illinois, Urbana, 111. 1114 W. Illi­

nois St. ARMSTRONG, Prof. G. N. Ohio Wesleyan Univ., Delaware, O. Box 246. ARMSTRONG, Asst. Prof. L. E. Stevens Inst, of Technology, Hoboken, N. J. ARNOLD, Asso. Prof. C. L. Ohio State Univ., Columbus, Ohio. ARTIAGA, SANTIAGO. City Engineer, Manila, P. I. City Hall. ASHCRAFT, Prof. T. B. Colby Coll., Waterville, Me. 34 Pleasant St. ASHTON, Prof. C. H. Univ. of Kansas, Lawrence, Kan. 1200 Ohio St. *ATCHISON, Prof. C. S. Washington and Jefferson Coll., Washington, Pa.

BABB, Asst. Prof. M. J. Univ. of Pennsylvania, Philadelphia, Pa. BABCOCK, R. W. Instr., Univ. of Wisconsin, Madison, Wis. *BACON, Prof. CLARA L. Goucher Coll., Baltimore, Md. 2316 N. Calvert St

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BAGBY, L. C. Univers i ty of Illinois, Urbana, 111. 408 W. Nevada St. BAKER, Prof. R. P. Univ. of Iowa, Iowa City, Ia. 929 Kirkwood Ave. BAILEY, Prof. F . H. Massachuset ts Inst , of Technology, Cambridge, Mass. BALLANTINE, Mrs. CONSTANCE R. Univ. of Chicago, Chicago, 111. 6148 Kim-

lark Ave. BALTAZAR, Prof. APOLINARIO. Univ. of the Phil ippines, Manila, P. I. 533 R.

Régente. BAREIS, Asst. Prof. GRACE M. Ohio State Univ., Columbus O. 201 W. 11th Ave. BARNARD, R. W. Instr . , Univ. of Michigan, Ann Arbor. Mich. 429 Fetch St. BARNETT, Asst. Prof. I. A. Univ. of Saskatchewan, Saskatoon, Canada. BARNEY, Dr. IDA. Yale Observatory, New Haven, Conn. 346 Whitney Ave. BARNUM, Dr. CHARLOTTE C. 288 W. 92d St., New York, N. Y. BARROW, ASSO. Prof. D. F . Univ. of Georgia, Athens, Ga. BARTER, Dr. J. D. Instr . , Univ. of California, Berkeley, Calif. 416 Wheeler

Hall. BARTLETT, Prof. D. P. Massachuset ts Inst , of Technology, Cambridge, Mass. BARTOL, Prof. W. C. Bucknell Univ., Lewisburg, Pa. BARTON, Prof. S. M. Univ. of the South, Sewanee, Tenn. BATCHELDER, Dr. P. M. Instr . , Univ. of Texas, Aust in, Tex. 808 W. 22d St. BATEMAN, Prof. HARRY. California Inst, of Technology, Pasadena, Calif. BAUDUIT, Prof. W. J. Howard Univ., Washington, D. C. BEAL, Asst. Prof. F . W. Univ. of Pennsylvania , Philadelphia, Pa. College

Hall. BEATTY, Asst. Prof. SAMUEL. Univ. of Toronto, Toronto, Canada. BECKETT, C. H. Sta te Life Insurance Co., Indianapolis , Ind. B E C K W I T H , Prof. W. S. Ohio Nor the rn Univ., Ada, Ohio. 718 S. Main St. BEETLE, Prof. R. D. Dar tmouth Coll., Hanover, N. H. BELCHER, D. R. American Telephone and Telegraph Co., 195 Broadway, New

York, N. Y. BELL, Prof. E. T. Univ. of Washington, Seattle, Wash. BENEDICT, Prof. H. Y. Univ. of Texas, Aust in, Tex. BENEDICT, Prof. SUZAN. R. Smi th Coll., Nor thampton, Mass. 11 Barrett PI ^BENNETT, ASSO. Prof. A. A. Univ. of Texas, Austin, Tex. BERG, Prof. E. J . Union College, Schenectady, N. Y. BERMAN, B E N J A M I N . Instr . , Univ. of Maryland, College Park , Md. BERNSTEIN, Asst. Prof. B. A. Univ. of California, Berkeley, Calif. 40 Shasta St. *BERRY, ARTHUR. Fellow, King 's Coll., Cambridge, England. Meadowside, Grant-

chester Meadows, Cambridge. BERRY, Dr. E. M. Instr . , Pu rdue Univ., Lafayette, Ind. 329 Russell St., West

Lafayette. BERRY, ASSO. Prof. W. J. Brooklyn Polytechnic Inst., Brooklyn, N. Y. 224 St.

John's PI. BETZ, HERMAN. Instr . , Yale Univ., New Haven, Conn. BETZ, W I L L I A M . Eas t High School, Rochester, N. Y. 301 Hazelwood Terrace. BIGBEE, J. A. High School, Li t t le Rock, Ark. 3110 Battery St. BIGGERSTAFF, J O H N . 2045 E. Couch St., Port land, Ore. BiKLÉ, C. E. Central High School, Syracuse, N. Y. BILL, E. G. Dar tmouth Coll., Hanover, N. H. 32 Occom Ridge. BIRCHBY, W. N. Instr . , California Inst , of Technology, Pasadena, Calif. B I R K H O F F , Prof. G. D. Ha rva rd Univ., Cambridge, Mass. 22 Craigie St. BLACK, FLORENCE L. Instr . , Univ. of Kansas , Lawrence, Kan. BLAIR, VEVIA. Horace Mann School, New York, N. Y. BLAKE, Dr. E. M. Drawer A, P r a t t Station, Brooklyn, N. Y. B U C H F E L D T , Prof. H. F . Stanford Univ., Stanford Universi ty, Calif. *BJLISS, Prof. G. A. Univ. of Chicago, Chicago, 111. 5625 Kenwood Ave.

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BLTTMBERG, Asst. Prof. HENRY. Univ. of Ill inois, Urbana, 111. 810 W. Michi­gan Ave.

BOGARD, Prof. AUGUSTUS. Coll. of St. Teresa, Winona, Minn. 1226 W. 1th SU BOHANNAN, Prof. R. D. Ohio Sta te Univ., Columbus, O. 226 lUh Ave. BOLZA, Prof. OSKAR. Univ. of Fre iburg , Fre iberg , i. B., Germany. Marienstr, 7. BOND, Asso. Prof. J. D. Univ. of Tennessee, Knoxville, Tenn. Box 1217. BORDEN, Dr. R. F . Instr . , Brown Univ., Providence, R. I. BORGER, Prof. R. L. Ohio Univ., Athens, O. BORGWARD, F . W. Instr . , Syracuse Univ., Syracuse, N. Y. 708 James St. BOSE, A. C. Univ. of Calcutta, Calcutta, India. 5 Mahendra Bose Lane, Syam-

bazar Post Office, Calcutta. BOULAD, FARID. Engineer Bridges Dept., State Railways, Cairo, Egypt. BOWDEN, Prof. J O S E P H . Adelphi Coll., Brooklyn, N. Y. 24 Clifton PL BOWEN, Asst. Prof. L. H. F u r m a n Univ., Greenville, S. C. BOWLER, Asst. Prof. E. W. New Hampsh i re Coll., Durham, N. H. BOYD, Prof. P. P. Univ. of Kentucky, Lexington, Ky. BRADSHAW, Asso. Prof. J. W. Univ. of Michigan, Ann Arbor, Mich. 1304 Cam­

bridge Rd. BRAHANA, Dr. H. R. Instr . , Univ. of Illinois, Urbana, 111. 507 N. Market St. BRAMBLE, ASSO. Prof. C. C. U. S. Naval Academy, Annapolis, Md. Uh St. BRAND, Prof. Louis . Univ. of Cincinnat i , Cincinnati , Ohio. College of Engi­

neering. BRATTON, Prof. W. A. W h i t m a n Coll., Walla Walla, Wash. 570 Boyer Ave. BRAY, Dr. H. E. Instr . , Rice Inst. , Houston, Tex. BRECKENRIDGE, W. E. Associate, Teachers ' Coll., Columbia Univ., New York,

N. Y. 21 Sycamore Ave., Mt. Vernon, N. Y. BRENKE, Prof. W. C. Univ. of Nebraska, Lincoln, Neb. 1250 S. 21st. St. BRIGGS, G. B. Instr . , Pr inceton Univ., Pr inceton, N. J. B R I N K , ASSO. Prof. R. W. Univ. of Minn., Minneapolis, Minn. BRODIE, Prof. W. M. Virginia Polytechnic Inst. , Blacksburg, Va. BROMWICH, Dr. T. J. I 'A . Lecturer , Cambridge Univ., Cambridge, England. 1

Selwyn Gardens. BROOKE, Prof. W. E. Univers i ty of Minnesota, Minneapolis, Minn. BROWN, Dr. B. H. Instr . , Dar tmouth Coll., Hanover , N. H. BROWN, Dr. ELEANOR P. (Mrs. B. H . ) . Hanover, N. H. *BROWN, Prof. E. W. Yale Univ., New Haven, Conn. 116 Everit St. BROWN, Prof. H. S. Hami l ton Coll., Clinton, N. Y. College Campus. *BROWN, J . S. Consult ing Engineer . F a r View, Box 38, Black Hall , Conn. BROWN, Prof. L I L L I A N O. Hood College, Freder ick, Md. BROWN, Asst. Prof. T. H. Columbia Univ., New York, N. Y. 140 North Broad­

way, White Plains, N. Y. BROWNE, Asst. Prof. E. T. Univ. of Nor th Carolina, Chapel Hill , N. C. Box

173. BRUMBAUGH, M. A. Univ. of Pennsylvania , Philadelphia, Pa. Box 6, College

Hall. BRYAN, ASSO. Prof. N. R. Univ. of Maine, Orono, Me. BRYANT, Asst. Prof. F . N. Syracuse Univ., Syracuse. N. Y. BUBB, Asst. Prof. F . W. Washington Univ., St. Louis, Mo. BUCHANAN, Prof. DANIEL. Univ. of Bri t i sh Columbia, Vancouver, Canada. BUCHANAN, Prof. H. E. Tulane Univ., New Orleans, La. BUCHANAN, Asst. Prof. MARGARET. Univ. of West Virginia, Morgantown, W. Va. BUCK, Asst. Prof. T H O M A S . Univ. of California, Berkeley, Calif. Faculty Clul>. BULLARD, Asso. Prof. J . A. U. S. Naval Academy, Annapolis, Md. 262 King

George St. *BULLARD, Prof. W. G. Syracuse Univ., Syracuse, N. Y. 117 Redfield PI.

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BUBCHAM, Prof. F. E. Central Coll., Fayette, Mo. •BURGESS, Dr. H. T. 37 Beers St., New Haven, Conn. BURGESS, Asst. Prof. R. W. Brown Univ., Providence, R. I. BURKETT, Asst. Prof. F. J. Trinity Coll., Hartford, Conn. 20 Jarvis Hall. BURWELL, Asst. Prof. W. R. Brown Univ., Providence, R. I. BUSSEY, Prof. W. H. Univ. of Minnesota, Minneapolis, Minn. BYERLY, Prof. W. E. Harvard Univ., Cambridge, Mass. 39 Hammond St. CAIN, Prof. WILLIAM. Univ. of North Carolina, Chapel Hill, N. C. CAIRNS, Prof. W. D. Oberlin Coll., Oberlin, 0. CAJORI, Prof. FLORIAN. Univ. of California, Berkeley, Calif. 2844 Webster

St. CALDWELL, Prof. MINNIE W. Chowan Coll., Murfreesboro, N. C. CALHOUN, ASSO. Prof. J. W. Univ. of Texas, Austin, Tex. 2805 Rio Grande St. CAMINERO, JOSE. Civil Engineer. Manzana de Gomez 251, Havana, Cuba. *CAMP, Prof. B. H. Wesleyan Univ., Middletown, Conn. 110 Mt. Vernon St. CAMP, Dr. C. C. Instr., Univ of Illinois, Urbana, 111. 607 W. Nevada St. CAMPBELL, A. D. Inst., Cornell Univ., Ithaca, N. Y. 3 Central Ave. CAMPBELL, Prof. D. F. Armour Inst, of Technology, Chicago, 111. CAMPBELL, Dr. G. A. American Telephone and Telegraph Co., 195 Broadway,

New York, N. Y. CAMPBELL. Asso. Prof. J. W. Univ. of Alberta, Edmonton, Canada. CANDY, Prof. A. L. Univ. of Nebraska, Lincoln, Neb. Station A. CAPARO, Prof. J. A. Notre Dame Univ., Notre Dame, Ind. Box 54. CAPRON, Prof. PAUL. U. S. Naval Academy, Annapolis, Md. 203 Duke of

Gloucester St. CAREY, Asst. Prof. E. F. A. Univ. of Montana, Missoula, Mont. 310 McLeod

Ave. CARLSON, ELIZABETH. Univ. of Minnesota, Minneapolis, Minn. 3020 lUh

Ave., S. CARMICHAEL, Prof. R. D. Univ. of Illinois, Urbana, 111. CARPENTER, ASSO. Prof. A. F. Univ. of Washington, Seattle, Wash . CARPENTER, R. V. A. Metropolitan Life Insurance Co., 1 Madison Ave., New

York, N. Y. CARR, Asst. Prof. F. E. Oberlin Coll., Oberlin, Ohio. 171 W. College St. CARROLL, EVELYN T. Instr., Wells College, Aurora, N. Y. *CARRUTH, Prof. W. M. Hamilton Coll., Clinton, N. Y. Box 25. CARSON, J. R. American Telephone and Telegraph Co., 195 Broadway, New

York, N. Y. CARTER, Asst. Prof. B. E. Colby Coll., Waterville, Me. CARTER, C. C. Bluffs, Scott County, 111. CARUS, Dr. E. H. La Salle, 111. CARVER, Prof. H. C. Univ. of Michigan, Ann Arbor, Mich. CARVER, Asst. Prof. W. B. Cornell Univ., Ithaca, N. Y. White Hall. CEDERBERG, Prof. W. E. Augustana Coll., Rock Island, 111. 3906 1th Ave. CHACE, Dr. A. B. Chancellor, Brown Univ., Providence, R. I. 99 Power St. CHADBOURNE, MARTHA F. Instr., Wheaton Coll., Norton, Mass. CHAPMAN, MARGARET F. Univ. of Wisconsin, Madison, Wis. 712 State St. CHAO, Dr. Y. R. Tsing Hua Coll., Peking, China. CHIANG, DR. Tso. Nan Kai Coll., Tientsin, China. CHITTENDEN, ASSO. Prof. E. W. Univ. of Iowa, Iowa City, la. 221 Physics Blclg. CHOW, M. C. Instr., Univ. of Cincinnati, Cincinnati, O. CHURCH. Prof. E. F. Pennsylvania Military Coll.. Chester, Pa. CLARKE, Prof. E. H. Hiram Coll.. Hiram. O. CLAWSON, Prof. J. W. Ursinus Coll.. Collegeville, Pa.

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CLEMENTS. Asso. Prof. G. R. U. S. Naval Academy. Annapolis, Md. 7 Thomp­son St.

CLUTZ. Prof. F . H. Get tysburg Coll., Gettysburg, Pa. COATES. W. M. Instr . , Univ. of Michigan, Ann Arbor, Mich. 1824 Geddes Ave. COBB. ASSO. Prof. C. W. Amhers t Coll., Amherst , Mass. 75 S. Pleasant St. COBB. Prof. H. E. Lewis Inst. , Chicago, 111. COBLE, Prof. A. B. Univ. of Illinois, Urbana, 111. 702 Washington Blvd. COE, Asst. Prof. C. J. Univ. of Michigan, Ann Arbor, Mich. 1020 Michigan Ave. COFFIN, Prof. L. M. Coe College, Cedar Rapids, la . 1027 2d Ave. COHEN, Asso. Prof. ABRAHAM. Johns Hopkins Univ., Balt imore, Md. COHEN, Dr. TERESA. Instr . , Pennsylvania Sta te Coll., Sta te College, Pa. 1709

Linden Ave., Baltimore, Md. *COLE, Prof. F . N. Columbia Univ., New York, N. Y. COLLINS, O. C. Instr . , Univ. of Nebraska, Lincoln, Neb. 2129 C. St. COLPITTS, Asso. Prof. E. C. Sta te Coll. of Washington, Pul lman, Wash. 410

Montgomery St. COLPITTS, Asso. Prof. J U L I A T. Iowa Sta te Coll., Ames, la . 219 Ash Ave. COLWELL, Prof. R. C. Geneva Coll., Beaver Fal ls , Pa. 3101 College Ave. COMSTOCK, Prof. C. E. Bradley Polytechnic I n s t , Peoria, 111. CONCDON, Asso. Prof. A. R. Teachers ' Coll., Univ. of Nebraska. Lincoln, Neb. CONKLING, R. P. Newark Technical School, Newark, N. J. CONWELL, Asst. Prof. G. M. New York Sta te Coll. for Teachers, Albany, N. Y. CONWELL, Prof. H. H. Beloit. College, Beloit, Wis. 921 Park Ave. •COOLIDGE, Prof. J . L. Ha rva rd Univ., Cambridge, Mass. 27 Fayerweather St-*COPELAND, Asst. Prof. L E N N I E P. Wellesley Coll., Wellesley, Mass. 14 Waban

St. COPENHAVER, M. LUCTLE. Inst r . , Univ. of Oregon, Eugene, Ore. 1594 Mill St. COREY, S. A. 1079 23d St., Des Moines, la . COURT, Asst. Prof. N. A. Univ. of Oklahoma, Norman, Okla. 425 W. Eufaula St. COWLEY, ASSO. Prof. ELIZABETH B. Vassar College, Poughkeepsie, N. Y. Cox, Dr. L. C. Mutual Life Insurance Co., 15 South St., Bal t imore. Md. CRAIG, Asst. Prof. C. F . Cornell Univ., I thaca, N. Y. 311 Elmwood Ave. CRAIG, J . D. Metropoli tan Life Insurance Co., 1 Madison Ave., New York, N. Y. CRATHORNE, Asst. Prof. A. R. Univ. of Ill inois, Urbana, 111. 1113 S. 4th St.,

Champaign. CRAWLEY, Prof. E. S. Univ. of Pennsylvania , Phi ladelphia, Pa. College Hall. CRESSE, ASSO. Prof. G. H. Univ. of Arizona, Tucson, Ariz. CROCKETT, Prof. C. W. Rensselaer Polytechnic Inst. , Troy, N. Y. CROMWELL, J. W., J r . 1815 13th St., Washington, D. C. CRONIN, Dr. S. ELIZABETH. Equi table Life Assurance Society, 120 Broadway,

New York, N. Y. CRUM, Asst. Prof. W. L. Yale Univ., New Haven, Conn. Yale Station. CUMMINGS, H. K. Bureau of S tandards , Washington, D. C. 417 Raymond St.,

Chevy Chace, Md. CUMMINGS, ASSO. Prof. LOUISE D. Vassar College, Poughkeepsie, N. Y. • C U N N I N G H A M , Lieut . Col. A. J. C. Fellow, King 's Coll., London, England. 20

Essex Villas, Kensington. London. W. 8. CURJEL, H. W. Il l inois Life Insurance Co., 1212 Lake Shore Drive, Chicago,

111. CURRIER, Asst. Prof. C. H. Brown Univ., Providence, R. I. CURTIS, A. M. Sta te Normal School,Oneonta, N. Y. CURTIS, Dr. H. B. Nor thwes te rn Univ., Evanston, 111. 2015 Orrington Ave. CURTISS, Prof. D. R. Nor thwes te rn Univ., Evanston, 111. 2023 Sherman Ave.

DADOURIAN, Asso. Prof. H . M. Tr in i ty Coll., Hartford, Conn,

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DALAKER, ASSO. Prof. H. H. Univ. of Minnesota, Minneapolis, Minn, DALE, J U L I A . Instr . , Univ. of Missouri, Columbia, Mo. DANCEY, Prof. L. S. Carroll Coll., Waukesha , Wis. DANIELL, Prof. P . J. Rice Inst. , Houston, Tex. DANTZIG, Dr. TOBIAS. BOX 15, Pal isade, N. J . D A U S , Dr. P. H. Instr . , Southern Branch, Univ. of California, Los Angeles,

Calif. 855 N. Vermont Ave. *DAVIS, Prof. H. N. Ha rva rd Univ., Cambridge, Mass. 221 Pierce Hall. DAVIS, H. T. Instr . , Univ. of Wisconsin, Madison, Wis. North Hall. DAVIS, Asst. Prof. J. E. Univ. of Arkansas , Fayettevi l le . Ark. DAVIS, Prof. J. M. Univers i ty of Kentucky, Lexington, Ky. 340 Madison PI. DAVISSON, Prof. S. C. Ind iana Univ., Bloomington, Ind. 515 E. Zd St. DEAN. ALICE C. Rice I n s t , Houston, Tex. DEARMAN. Prof. D. S. Millsaps Academy, Jackson, Miss. DECHERD. MARY E. Instr . , Univ. of Texas, Austin, Tex. 2313 Nueces St. DECKER, Prof. P . F . Svracuse Univ., Syracuse. N. Y. 312 Marshall St D E COU. Prof. E. E. Univ. of Oregon, Eugene, Ore. Apt. B 12, Bartle Court. *DEDERTCK. Asst. Prof. L. S. U. S. Naval Academy, Annapolis, Md. 194 Duke o1

Gloucester St. DEFOE, Prof. L. M. Univ. of Missouri, Columbia. Mo. 810 Virainia Ave. DETMEL, Asst. Prof. R. F . Stevens Inst , of Technology, Hoboken. N. J. D E LONG, Prof. I. M. Univ. of Colorado, Boulder, Colo. 1341 Broadway. D E LURY, Prof. A. T. Univ. of Toronto, Toronto. Canada. • D E N N E T T . Dr. W. S. 36 Gramercy Pa rk . New York, N. Y. DENTON. As«ît. Prof. W. W. Univ. of Michigan, Ann Arbor, Mich. 1014 Corn-

well PL D E PORTE, Asst. Prof. J. V. New York Sta te Coll. for Teachers, Albany, N. Y. DICKINSON. Prof. C. N. Holl ins Coll., Holl ins, Va. DTOKSON, Prof. L. E . Univ. of Chicago, Chicago, 111. 5535 University Ave. DTLLINGHAM. ASSO. Prof. ALEXANDER. U. S. Naval Academy, Annapolis, Md. D I M I C K . C. E Instr . , U. S. Coast Guard Academy, New London, Conn. 47

Sauire St. D I N E S , Prof. L. L. Univ. of Saskatchewan, Saskatoon, Canada. DOAK, Asso. Prof. ELEANOR C. Mount Holyoke Coll., South Hadlev, Mass. DODD, .As^o. Prof. E. L. Univ. of Texas, Austin, Tex. "Williams Coll., Williams-

town, Mass. DOLL, THEODORE. En gin per. Nöra Snrinsrs, Flovd Co., l a . DONOHITE. Prof. J. N. Columbia Univ., Por t land, Ore. DOSTAL, Asst. Prof. B. F . Univ. of Denver, Denver, Colo. DOUGLAS. Dr. J E S S E . Ins t r . , Columbia Univ., New York, N. Y. 275 E. Broad­

way. DOWLTNO. As«o. Prof. L. W. Univ. of W ^ o n s i n . Madison, Wis. 2 Robv Rd. DRESDEN, Asso. Prof. ARNOLD. Univ. of Wisconsin, Madison, Wis . 2114 Vilas

St DRTRCOLL. Pres . F . A. Villanova Coll., Villanova, Pa . DUNCAN, F . O. Inst r . , Univ. of Missouri, Columbia, Mo. 403 Matthews St D U N K E L . Asso. Prof. OTTO. Wash ing ton Univ., St. Louis. Mo. DURELL, Dr. FLETCHER. Lawrencevil le School, Lawrenceville, N. J. DUREEE. Prof. W. P. Hobar t Coll., Geneva, N. Y. 639 Main St. DYSART, ROBERT. Certified Public Accountant . 40 State St., Boston, Mass.

EAGLES, Prof. T. R. Howard Coll., B i rmingham, Ala. 8016 Underwood Ave. EARLE, Prof. M. D. F u r m a n Univ., Greenville, S. C. ECHOLS, Prof. C. P. U. S. Mil i tary Academy, Wes t Point , N. Y. ECHOLS, Prof. W. H. Univ. of Virginia, Universi ty, Va.

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EDINGTON, Dr. W. E. 1100 N. Center St., Terre Haute, Ind. EDMONDSON, Prof. T. W. New York Univ., University Heights, New York, N. Y. EDWARDS. Prof. G. C. Univ. of California, Berkeley, Calif. 2546 Dana St. EELLS, Prof. W. C. Whitman Coll., Walla Walla, Wash. 1134 Alvarado Ter­

race. EIESLAND, Prof. JOHN. Univ. of West Virginia, Morgantown, W. Va. •EISENHART, Prof. L. P. Princeton Univ., Princeton, N. J. •ELLIOTT, Prof. E. B. Oxford Univ., Oxford, England. 4 Bardwell Rd. ELLIOTT, W. W. Instr., Cornell Univ., Ithaca, N. Y. 311 Elmwood Ave ELSTON, J. S. Travelers Insurance Co., Hartford, Conn. EMCH, ASSO. Prof. ARNOLD. Univ. of Illinois, Urhana, 111. 502 W. Oregon St. EMMONS, Prof. C. W. Simpson Coll., Indianola, la. EMMONS, Asst. Prof. L, C. Michigan Agric. Coll., East Lansing, Mich. ENGLISH, HARRY. 2907 P St., N. W., Washington, D. C. EPPERSON, Prof. C. A. State Teachers' College, Kirksville, Mo. 214 N. New St. EPSTEEN, Dr. SAUL. Bristol, Colo. ERWIN, Prof. J. T. George Washington Univ., Washington, D. C. 2023 G. St.,

N.W. •ESCOTT, E. B. Walton School of Commerce, Chicago, 111. 1019 S. East Ave.,

Oak Park, III. ESHLEMAN, J. D. Instr., Univ. of Pennsylvania, Philadelphia, Pa. ESTY, Prof. T. C. Amherst Coll., Amherst, Mass. ETTLINGER, Adj. Prof. H. J. Univ. of Texas, Austin Tex. 2910 Harris Park

Ave. • E V A N S , Prof. G. C. Rice Inst., Houston, Tex. EVANS, G. W. Charlestown High School, Boston, Mass. 31 Broad St., Lynn,

Mass. EVANS, Prof. H. B. Univ. of Pennsylvania, Philadelphia, Pa. College Hall. EVANS, P. H. Northwestern Mutual Life Insurance Co., Milwaukee, Wis. 210

Wisconsin St. EVERETT, Asst. Prof. H. S. Bucknell Univ., Lewisburg, Pa. EVERSTJLL, B E S S M. Univ. of Cincinnati, Cincinnati, O.

FALCONER, B. L. 1501 Custom House, Boston, Mass. FALES, Asst. Prof. H. A. Columbia Univ., New York, N. Y. FARNATT, Asso. Prof. E. F. Univ. of Cincinnati, Cincinnati, O. FATTGHT, Prof. J. B. Yankton Coll., Yankton, S. Dak. FEINLER, F. J. St. John's Hospital, Port Townsend, Wash. FELDSTEIN-TARTAKOVSKY, M. M. 1223 East 57th St., Chicago, 111. FELTGES, EDNA M. Instr., Univ. of Wisconsin, Madison, Wis. 419 Sterling PI. F E N N , Asst. Prof. I. H. Brooklyn Polytechnic Inst., Brooklyn, N. Y. 99 Liv­

ingston St •FERRY, Pres. F. C. Hamilton Coll., Clinton, N. Y. FIELD, Prof. FLOYD. Georgia School of Technology, Atlanta, Ga. R. F. D. 1,

Decatur. FIELD, Prof. PETER. Univ. of Michigan, Ann Arbor, Mich. 904 Olivia Ave. •FIELDS, Prof. J. C. Univ. of Toronto, Toronto, Canada. FINDLAY, Prof. WILLIAM. McMaster Univ., Toronto, Canada. 153 Westminster

Ave. F I N E , Prof. H. B. Princeton Univ., Princeton, N. J. FINKEL, Prof. B. F. Drury Coll., Springfield, Mo. FISHER, Prof. IRVING. Yale Univ., New Haven, Conn. 460 Prospect St. • F I S K E , Prof. T. S. Columbia Univ., New York, N. Y. FITCH, Dr. A N N I E M. (Mrs. EDWARD). Clinton, N. Y.

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*FITE. Prof. W. B. Columbia Univ., New York, N. Y. FITTERER, Prof. J. C. Univ. of Wyoming, Laramie, Wyo. 511 8. 11th St. FLAMMER, Asst. Prof. ERNEST. Queen's Univ., Kingston, Ontario, Canada. FLEET, Prof. R. R. William Jewell Coll., Liberty, Mo. FOBERG, J. A. Pennsylvania Dept. of Public Instruction. Camp Hill, Cum­

berland Co., Pa. FOCKE, Prof. T. M. Case School of Applied Science, Cleveland, 0. FORAKER, Prof. F. A. Univ. of Pittsburgh, Pittsburgh, Pa. FORD, Asst. Prof. L. R. Rice Inst., Houston, Tex. *FORD, Prof. W. B. Univ. of Michigan, Ann Arbor, Mich. 904 Forest Ave. FORSYTH, Prof. A. R. Imperial Coll. of Science and Technology, London, S W.,

England. FORSYTH. Asst. Prof. C. H. Dartmouth Coll., Hanover, N. H. Thayer Lodge. FORT, Prof. TOMLINSON. Univ. of Alabama, University, Ala. FOSTER, Dr. M. C. Instr., Yale Univ., New Haven, Conn. North Sheffield

Halt. FOSTER, R. M. American Telephone and Telegraph Co., 195 Broadway, New

York, N .Y. FRALEIGH, P. A. Instr., Cornell Univ., Ithaca, N. Y. White Hall. FRANKLIN, Dr. FABIAN. 617 W. 113th St., New York, N. Y. FRANKLIN, Dr. PHILIP. Instr., Harvard Univ., Cambridge, Mass. 800 N. Chest­

nut St., Williams oridg e, Neto York, N. Y. FRÉCHET, Prof. MAURICE. Univ. of Strasbourg, Strasbourg, France. Place de

l'Université. FRIZELL, Prof. A. B. Massachusetts Nautical School. 179 St. Botolph St., Boston,

Mass. FRY, Dr. T. C. Western Electric Co., 463 West St., New York, N. Y. GABA, ASSO. Prof. M. G. Univ. of Nebraska, Lincoln, Neb. 1425 S. 22d 8t. GAFAFER, W. M. Columbia Univ., New York, N. Y. Leonia, N. J. GALE, Prof. A. S. Univ. of Rochester, Rochester, N. Y. GARABEDIAN, C. A. Harvard Univ., Cambridge, Mass. 20 Conant Hall. GARIS, Prof. C. F. F. Union Coll., Schenectady, N. Y. 226 Parkwood Blvd. GARRETSON, Asst. Prof. W. V. N. Rutgers College, New Brunswick, N. J. 104

Senior St. GARRETT, Prof. W. H. Baker Univ., Baldwin, Kan GARRISON, J. G. Polytechnic High School, San Francisco, Calif. 710 Clayton St. GARRISON, Prof. W. A. King Coll., Bristol, Tenn.-Va. GAVETT, Asst. Prof. G. I. Univ. of Washington, Seattle, Wash. GAY, H. J. Instr., Worcester Polytechnic Inst., Worcester, Mass. GEHMAN, H. M. Instr., Univ. of Pennsylvania, Philadelphia, Pa. College

Hall. GERST, Rev. F. J. Loyola Coll., Baltimore, Md. GIBBENS, Dr. GLADYS E. C. Instr., Univ. of Minnesota, Minneapolis, Minn. 122

Folwell Hall. GIBSON, Prof. G. A. Univ. of Glasgow, Glasgow, Scotland. 10 The university. GIBSON, Prof. J. L. Univ. of Utah, Salt Lake City, Utah. GILCHRIST, Asst. Prof. LACHLAN. Univ. of Toronto, Toronto, Canada. GILL, B. P. Instr., Coll. of the City of New York, New York, N. Y. 971 Trin­

ity Ave. *GILLESPIE, Asst. Prof. D. C. Cornell Univ., Ithaca, N. Y. Cayuga Heights. GILLSON, Asso. Prof. A. H. S, McGill Univ., Montreal, Canada.

15

GILMAN, Asst. Prof. R. E. Brown Univ., Providence, R. I. 654 Hope Bt.

GLASGOW, Dr. JOSEPHINE B. (Mrs.). Instr., Univ. of Illinois, Urbana, 111. 924 W. Illinois Bt.

GLASHAN, Dr. J. S. C. 68 Somerset St., W., Ottawa, Canada. GLAZIER, Prof. HARRIET E. Univ. of California, Southern Branch, Los Angeles,

Calif. GLEASON, R. E. Princeton Univ., Princeton, N. J. GLENN, Prof. O. E. Univ. of Pennsylvania, Philadelphia, Pa. 127 McKinley Ave.,

Lansdowne, Pa. GLOVER, Prof. J. W. Univ. of Michigan, Ann Arbor, Mich. 620 Oxford Rd. GOKHALE, Dr. V. D. Univ. of Chicago, Chicago. 111. Faculty Exchange. GOLDSBERRY, NEOMA L. Instr., Univ. of Missouri, Columbia, Mo. 202 Engi­

neering Bldg. GOSSARD, Prof. H. C. Univ. of Wyoming, Laramie, Wyo. GOTTSCHALL, LOUIS. 45 Mills St., Astoria, Long Island, N. Y. •GOULD, ALICE B. Care of W. W. Vaughan, Exchange Bldg., Boston, Mass. GOUWENS, Asst. Prof. CORNELIUS. Iowa State Coll., Ames, la. 109 Hyland

Ave. GRABER, Prof. M. E. Morningside Coll., Sioux City, la. 4005 Morningside

Ave. GRAHAM, GEORGE. Central States Life Insurance Co., St. Louis, Mo. GRAHAM, W. J. Equitable Life Assurance Society, 120 Broadway, New York,

N. Y. GRANVILLE, Pres. W. A. Gettysburg Coll., Gettysburg, Pa. GRAUSTEIN, Dr. MARY C. (Mrs. W. C ) . 44 Langdon St., Cambridge, Mass. •GRAUSTEIN, Asst. Prof. W. C. Harvard Univ., Cambridge, Mass. 44 Lang-

don Bt. GRAVATT, Asso. Prof. T. E. Pennsylvania State Coll., State College, Pa. 500

E. College Ave. GRAVES, Asst. Prof. G. H. Purdue Univ., Lafayette, Ind. 829 Main Bt., West

Lafayette. GREEN, Dr. C. F. Instr., Univ. of Illinois, Urbana, 111. 803 W. Oregon Bt. *GREENHILL, Sir GEORGE. 1 Staple Inn., London, W., England. GRENNAN, Dr. ELIZABETH B. (Mrs. J O H N ) . 716 W. Washington St., Ann Arbor,

Mich. GRIFFIN, Prof. F. L. Reed Coll., Portland, Ore. *GROAT, B. F. Consulting Engineer. 6306 Woodbine Ave., Philadelphia, Pa. GRONWALL, Dr. T. H. Consulting Mathematician. 68 Bank St., New York,

N. Y. GROVE, Dr. C. C. Metropolitan Life Insurance Co., New York, N. Y. Baldwin,

N. Y. GROWE, Mrs. ELEANOR. Univ. of California, Berkeley, Calif. 420 Wheeler

Hall. GUDHEIM, Asso. Prof. H. E. Virginia Polytechnic Inst., Blacksburg, Va. GUMMER, Prof. C. F. Queen's Univ., Kingston, Ontario, Canada. *GUMMERE, Prof. H. V. 418 S. Wycombe Ave., Lansdowne, Pa. GUNDERSEN, Prof. CARL. Oklahoma Agric. and Mech. Coll., Stillwater, Okla.

217 College Ave. GUNTHER, Prof. C O. Stevens Inst, of Technology, Hoboken, N. J. Box 77. GURNEY, Prof. L. E. Univ. of the Philippines, Manila, P. I.

x« HALL, Prof. A. G. Univ. of Michigan, Ann Arbor, Mich. 1036 Oakland Ave. HALPERIN, ASSO. Prof. HILLEL. Agric. and Mech. Coll. of Texas, College Station,

Tex. HAMLIN, Prof. T. L. Clarkson Coll., Potsdam, N. Y. 19 Pleasant St. HAMMOND, Asst. Prof. E. S. Bowdoin Coll., Brunswick, Me. 84 Federal St. •HANAWALT, Prof. F. W. Coll. of Puget Sound, Tacoma, Wash. 826 N. Steele

St HANCOCK, Prof. HARRIS. Univ. of Cincinnati, Cincinnati, Ohio. 2365 Auburn

Ave. HANNA, Prof. U. S. Indiana Univ., Bloomington, Ind. 828 Atwater Ave. *HARDCASTLE, PRANCES. 3 Osborne Terrace, Newcastle-on-Tyne, England. HARDING, Prof. A. M. Univ. of Arkansas, Fayetteville, Ark. HARDY, Prof. G. H. New Coll., Oxford, England. *HARDY, Prof. J. G. Williams Coll., Williamstown, Mass. •HARKNESS, Prof. JAMES. McGill Univ., Montreal, Canada. HARRELL, Asst. Prof. J. W. Baylor Univ., Waco, Tex. Brown Univ., Providence,

R. I. HARRIS, Asso. Prof. ELEANORA. Central Missouri Teachers' Coll., Warrensburg,

Mo. 205 Broad St. HARSHBARGER, Prof. W. A. Washburn Coll., Topeka, Kan. 1401 College Ave. HART, Asso. Prof. W. L. Univ. of Minnesota, Minneapolis, Minn. 100 Folwell

Hall. HART, Asst. Prof. W. W. Univ. of Wisconsin, Madison, Wis. HARTER, Prof. G. A. Univ. of Delaware, Newark, Del. HARTLEY, R. W. Instr., Univ. of Pennsylvania, Philadelphia, Pa. College Hall. HASEMAN, Prof. CHARLES. Univ. of Nevada, Reno, Nev. HASEMAN, Dr. MARY G. Instr., Univ. of Illinois, Urbana, 111. HASKELL, Prof. M. W. Univ. of California, Berkeley, Calif. Box 3. HASKINS, Prof. C. N. Dartmouth Coll., Hanover, N. H. Hanover Rd., Le­

banon. HASSLER, Asso. Prof. J. O. Univ. of Oklahoma, Norman, Okla. 425 Lahoma

Ave. HATHAWAY, Prof. A. S. Boerne, Tex. HAUSLE, EUGENIE C. 900 Tinton Ave., Bronx, New York, N. Y. HAWKES, Prof. H. E. Columbia Univ., New York, N. Y. HAWKESWORTH, Rev. A. S. Mathematician, U. S. Navy. 1807 19th St., N. W.,

Washington, D. C. HAYASHI, Prof. TSURUICHI. Coll. of Science, Tôhoku Imperial Univ., Sendai,

Japan. HAYDEN, CAMILLA. Instr., Univ. of Wisconsin, Madison, Wis. 311 N. Char­

ter St. •HAZLETT, Asst. Prof. OLIVE C. Mount Holyoke Coll., South Hadley, Mass. HEAL, W. E. Bureau of Plant Industry, Washington, D. C. 3747 Hunting­

ton St., N. W. HEBBERT, Dr. C. M. American Telephone and Telegraph Co., 195 Broadway,

New York, N. Y. HEDRICK, Prof. E. R. Univ. of Missouri, Columbia, Mo. HEDRICK, Dr. H. B. Office of Chief of Ordnance, Washington, D. C. 3240 £

St., N. W. HEINZ, Prof. A. A. Tsing Hua College, Peking, China. HELLER, Prof. N. B. Temple Univ., Philadelphia, Pa. 853 N. 20th St. HENDERSON, Prof. ARCHIBALD. Univ. of North Carolina, Chapel Hill, N. C. HENDERSON, ROBERT. Equitable Life Assurance Society, 120 Broadway, New

York, N. Y. HENNEL, ASSO. Prof. CORA B. Indiana Univ., Bloomington, Ind. 822 E. Zd St.

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HEROD, W. R. General Electric Co», Schenectady, N. Y. 1 Union St. HERR, Asst. Prof. GERTRUDE A. Iowa State Coll., Ames, la. 2402 Lincoln Way. HEWES, Dr. Lr. I. U. S. Bureau of Public Roads. 881 Mills Bldg., San Fran­

cisco, Calif. HEZLETT, E. H. Connecticut General Life Insurance Co., Hartford, Conn. HIGHTOWER, Prof. RUBY U. Shorter Coll., Rome, Ga. HILDEBRANDT, Asso. Prof. T. H. Univ. of Michigan, Ann Arbor, Mich. 1930

Cambridge Rd. HILL, L. S. Instr., Yale Univ., New Haven, Conn. 625 Orange St. HILLE, Dr. C. E. Instr., Princeton Univ., Princeton, N. J. 64 Nassau St. HILTEBEITEL, Dr. A. M. Trappe, Montgomery Co., Pa. HILTON, Prof. HAROLD. Bedford College, York Gate, Regent's Park, London, N.

W. 1, England. HIMWICH, Dr. A. A. 1913 Madison Ave., New York, N. Y. HINSCH, Asst. Prof. V. B. Missouri School of Mines, Rolla, Mo. HITCHCOCK, Prof. R. R. Univ, of North Dakota, University, N. Dak. HOAR, R. S. Patent Attorney. Bucyrus Company, South Milwaukee, Wis. HOBBS, Asso. Prof. A. W. Univ. of North Carolina, Chapel Hill, N. C. HOBENSACK, CLARICE S. Ohio State Univ., Columbus, O. HODGE, Asst. Prof. P. H. Purdue Univ., Lafayette, Ind. 518 Russell St., W.

Lafayette. HODGKINS, Pres. H. L. George Washington Univ., Washington, D. C. HODGSON, Prof. J. E. Univ. of West Virginia, Morgantown, W. Va. 209

Grant Ave. HOLDER, Prof. F. J. Mercer Univ., Macon, Ga. 912 College St. HOLGATE, Prof. T. F. Northwestern Univ., Evanston, 111. 617 Library PU HOLLCROFT, Prof. T. R. Wells Coll., Aurora, N. Y. HOLMES, HELMA L. Instr., Univ. of Texas, Austin, Tex. Box 27, University

Station. HOPKINS, CHARLES.J Univ. of Illinois, Urbana, 111. HOPKINS, ASSO. Prof. L. A. Univ. of Michigan, Ann Arbor, Mich. 1517 S. Uni­

versity Ave. HORTON, Dr. GOLDIE P. Instr., Univ. of Texas, Austin, Tex. 504 W. 32d

St. HOSFORD, HEMPHILL. Instr., Southern Methodist Univ., Dallas, Tex. HOSKINS, Prof. L. M. Stanford Univ., Stanford University, Calif. 1240

Waverly St., Palo Alto, Calif. HOWE, DEAN H. A. Univ. of Denver, Denver, Colo. 2221 S. Columbine St. HOWLAND, Prof. L. A. Wesleyan Univ., Middletown, Conn. 34 Home Ave. HOYT, R. A. American Telephone and Telegraph Co., 195 Broadway, New

York, N. Y. HUGHES, JEWELL C. Instr., Univ. of Arkansas, Fayetteville, Ark. HULBERT, Prof. L. S. Johns Hopkins Univ., Baltimore, Md. HULL, Prof. DANIEL. Univ. of Notre Dame, Notre Dame, Ind. HUME, Prof. ALFRED. Univ. of Mississippi, University, Miss. "•HUNTINGTON, Prof. E. V. Harvard Univ., Cambridge, Mass. 27 Everett St.

HURWITZ, Asst. Prof. W. A. Cornell Univ., Ithaca, N. Y. 8 White Hall. HUTCHESON, W. A. Mutual Life Insurance Co., 34 Nassau St., New York, N. Y. HUTCHINSON, Prof. J. I. Cornell Univ., Ithaca, N..Y. 140 Thurston Ave. HYATT, Prof. F. K. Pennsylvania Military Coll., Chester, Pa. INCE, Dr. E. L. Lecturer, Univ. of Liverpool, Liverpool, England. INFANGER, LOUISE S. (Mrs. A. O.). 24 Watson Ave., East Orange, N. J. INGELS, NELLE L. Interstate Commerce Commission, Washington, D. C. E-J?

Bldg., Government Hotels.

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INGOLD. Asst. Prof. Louis. Univ. of Missouri, Columbia. Mo. 206 Thilly Ave. INGRAHAM. M. H. Univ. of Chicago. Chicago, 111. 52 Snell Hall. IRWIN, Asst. Prof. FRANK. Univ. of California, Berkeley, Calif. 1625 Arch St.

•JACKSON, Prof. D U N H A M . Univ. of Minnesota, Minneapolis, Minn. JACKSON, Asso. Prof. J. B. Univ. of South Carolina, Columbia, S. C. JACKSON, Dr. L. L. 106 Bayard Lane, Princeton, N. J. JACOBS, Dr. JESSIE M. Instr., Univ. of Texas, Austin, Tex. JACOBUS, D. S. Babcock and Wilcox Co., 85 Liberty St., New York, N. Y. JAMES, ASSO. Prof. G. O, Washington Univ., St. Louis, Mo. JAMES, Asst. Prof. GLENN. Southern Branch, Univ. of California, Los Angeles,

Calif. 766 N. Alexandria St. JAMISON, Prof. G. H. State Teachers' Coll., Kirksville, Mo. JOFFE, S. A. Mutual Life Insurance Co., 32 Nassau St., New York, N. Y. JOHNSON, Prof. R. A. Hamline Univ., St. Paul, Minn. JOHNSON, Prof. W. W. U. S. Naval Academy, Annapolis, Md. 909 St. Paul St.,

Baltimore, Md. JONES, Dr. C. C. Chancellor, Univ. of New Brunswick, Fredericton, N. B.,

Canada. JONES, Prof. E. H. Southern Methodist Univ., Dallas, Tex. JONES, Prof. J. L. Akron Univ., Akron, 0. 49 Kathron Ave., Cuyahoga Falls, (J. JONES, MARGARET E. Ohio State Univ., Columbus, O. JORDAN, Dr. CHARLES. 12 Lisznyai-Utca I, Budapest, Hungary. JORDAN, Asst. Prof. H. E. Univ. of Kansas, Lawrence, Kan. 1600 Kentucky St. JOY, F. A. Instr., New Hampshire Coll., Durham, N. H. Newfields, N. H.

KARPINSKI, Prof. L. C. Univ. of Michigan, Ann Arbor, Mich. 1315 Cambridge Rd.

*KASNER, Prof. EDWARD. Columbia Univ., New York, N. Y. 22 W. 119th Si. KAZARINOFF, D. C. Instr., Univ. of Michigan, Ann Arbor, Mich. 1914 Geddes

Ave. KEASEY, Prof. M. A. South Philadelphia High School, and Drexel Inst.,

Philadelphia, Pa. 306 Brookline Blvd., Ó9M St. Branch. KEFFER, RALPH. Aetna Life Insurance Co., Hartford, Conn. KELLOGG, Asso. Prof. O. D. Harvard Univ., Cambridge, Mass. 20 Craigie St. KELLS, Dr. L. M. Instr., U. S. Naval Academy, Annapolis, Md. KELLY, Prof. J. P. Boston Coll., Chestnut Hill, Mass. KEMPNER, Asst. Prof. A. J. Univ. of Illinois, Urbana, 111. KENDALL, Asst. Prof. CLARIBEL. Univ. of Colorado, Boulder, Colo. 1091 14M

St. KENNELLY, Prof. A. E. Harvard Univ., and Massachusetts Inst, of Technology,

Cambridge, Mass. KENT, ASSO. Prof. F. C. Oregon Agric. Coll., Corvallis, Ore. •KEYSER, Prof.C. J. Columbia Univ., New York, N. Y. KILLAM, Prof. S. D. Univ. of Alberta, Edmonton, Canada. KIMBALL, B. F. Harvard Univ., Cambridge Mass. 12 Conant Hall. KINDLE, Asst. Prof. J. H. Univ. of Cincinnati, Cincinnati, Ohio. KINGSTON, Prof. H. R. Western Univ., London, Ontario, Canada, KINNEY, Dr. J. M. Crane Junior Coll., Chicago, 111. 6747 Clyde Ave. KIRCHER, Dr. E. A. T. National City Co., New York, N. Y. 212 E. 1th St..

Plainfield. N. J. KLAUBER. L. M. San Diego Consolidated Gas and Electric Co., San Diego, Calif

2569 Front St. KLEIN, A. L. California Inst, of Technology, Pasadena, Calif.

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KLINE, Asst. Prof. J. R. Univ. of Pennsylvania, Philadelphia, Pa. Riverview Ave., Swarthmore, Pa.

KNEBELMAN, Asst. Prof. M. S. Lehigh Univ., South Bethlehem, Pa. 415 Chero­kee St.

KNISELY, ALEXANDER» Instr., Valparaiso Business Coll. Columbia City, Ind. KORN, Prof. ARTHUR. Technical School, Charlottenburg, Germany. Schlü-

terstr. 25. KRATHWOHL, Asso. Prof. W. C. Armour Inst, of Technology, Chicago, 111. KUHN, Prof. H. W. Ohio State Univ., Columbus, 0. 1145 Fairview Ave.,

Grandview Heights, Columbus. *KUSCHKE, Prof. C. G. P. Univ. of Porto Rico, Rio Piedras, Porto Rico. KÜSTERMANN, Dr. W. W. Box 788, San Diego, Calif.

•LADITE, POMEROY. Public Accountant. 638 Prentis Ave., Detroit, Mich. LAIRD, J. M. Connecticut General Life Insurance Co., Hartford, Conn. LAMBERT, Prof. P. A. Lehigh Univ., South Bethlehem, Pa. 323 N. Centre

St., Bethlehem. LAMBERT, W. D. U. S. Coast and Geodetic Survey, Washington, D. C. LAMOND, Dr. J. K. Telephone Engineer. 3 Pennsylvania Ave., Brookline, Del.

Co., Pa. LAMSON, Dr. K. W. Instr., Golumbia Univ., New York, N. Y. LANDIS, Prof. W. W. Dickinson Coll., Carlisle, Pa. LANDRY, Prof. A. E. Catholic Univ., Washington, D. C. 3624 iZth St., Brook-

land, D. a LANE, Asst. Prof, E. P. Univ. of Wisconsin, Madison, Wis. LANGER, Dr. R. E. Travelling Fellow, Harvard Univ. 270 Garden St., Cambridge,

Mass. LANGMAN, HARRY. 35 W. 61st St., New York, N. Y. LAREW, Prof. GILLIE A. Randolph-Macon Woman's Coll., Lynchburg, Va. LARUS, J. R., Jr. Phoenix Mutual Life Insurance Co., Hartford, Conn. LASLEY, ASSO. Prof. J. W., Jr. Univ. of North Carolina, Chapel Hill, N. C. LAVES, Asso. Prof. KURT. Univ. of Chicago, Chicago, 111. 5611 Kenwood Ave. LAWLESS, Prof. O. G. Talladega Coll., Talladega, Ala. 122 Range Line St. LEAVENS, D. H. Instr., Yale in China, Changsha, China. LEBESGUE, Prof. HENRI. Collège de France, Paris, France. 35 bis, rue St.

Sabin. LEFSCHETZ, Asso. Prof. SOLOMON. Univ. of Kansas, Lawrence, Kan. 937 Mis­

souri St. LEHMAN, Prof. D. A. Goshen Coll., Goshen, Ind. LEHMER, Prof. D. N. Univ. of California, Berkeley, Calif. 2736 Regent St. LEIB, Prof. D. D. Connecticut Coll. for Women, New London, Conn. 358 Mo-

hegan Ave. LENNES, Prof. N. J. Univ. of Montana, Missoula, Mont. LEONARD, Prof. H. B. Univ. of Arizona, Tucson, Ariz. LESTER, Prof. O. C. Univ. of Colorado, Boulder, Colo. 1061 11th St. LE STOURGEON, Asst. Prof. FLORA E. Univ. of Kentucky, Lexington, Ky. 110

Maxwellton Court. LETJSCHNER, Prof. A. O. Univ. of California, Berkeley, Calif. 1816 Scenic

Ave. LEVAIN, Prof. P. V. Holy Cross Coll., Worcester, Mass. LEVI-CIVITA, Prof. TULLIO. Univ. of Rome, Rome, Italy. Via Sardegna 50,

Rome 25. LEVITA, M. M. Instr., Temple Univ., Philadelphia, Pa,

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LEVY, Dr. SOPHIA H. Instr., Univ. of California, Berkeley, Calif. 475 Wheeler Hall.

LEWIS, Asst. Prof. F. A. Univ. of Alabama, University, Ala. Box 365. LEWIS, Prof. FLORENCE P. Goucher Coll., Baltimore Md. 2435 N. Charles St. LEYZERAH, Dr. PEYSAH. Instr., Lehigh Univ., South Bethelehem, Pa. 473 Birkel

Ave. LIBBY, B. B. Polytechnic High School, San Francisco, Calif. LINDSEY, Asso. Prof. LOUIS. Syracuse Univ., Syracuse, N. Y. 562 Clarendon

St LINEHAN, Asst. Prof. P. H. Coll. of the City of New York, New York, N. Y.

346 Convent Ave. LING, Prof. G. H. Univ. of Saskatchewan, Saskatoon, Canada. LINKER. J. B. Instr., Univ. of North Carolina, Chapel Hill, N. C. Johns Hop­

kins Univ.. Baltimore, Md. LINTON, M. A. Provident Life and Trust Co., 409 Chestnut St., Philadelphia, Pa. LIPKA, Asst. Prof. JOSEPH. Massachusetts Inst, of Technology, Cambridge, Mass. LOCKE. L. L. Brooklyn Training School for Teachers, Brooklyn, N. Y. 950 St.

Johns1 Place. LOGSDON, Dr. MAYME I. (Mrs.). Instr., Univ. of Chicago, Chicago, 111. LONG, T. R. Univ. of Rochester, Rochester, N. Y. 75 Cvpress St. LONGLEY, Prof. W. R. Yale Univ., New Haven, Conn. 595 Orange St. LORING. R. A. Instr., Dartmouth Coll., Hanover, N. H. LOVE, Prof. A. E. H. Oxford Univ., Oxford, England. 34 St. Margaret's Rd. LOVE, Asso. Prof. C. E. Univ. of Michigan, Ann Arbor, Mich. •LOVETT, Pres. E. O. Rice Inst., Houston, Tex. LTJBY, Prof. W. A. Kansas City Junior Coll., Kansas City Mo. 3415 Penn. Ave. LUCK, ASSO. Prof. J. J. Univ. of Virginia, University, Va. Colonnade Club. •LUDLOW, Col. H. H. Care of Adjutant General, U. S. Army, Washington, D. C. LUFKIN, H. M. Dunkirk High School, Dunkirk, N. Y. LUNDEN, D. A. Cooper Union, New York, N. Y. 35 Charles St. LUNN, Asso. Prof. A. C. Univ. of Chicago, Chicago, 111. 5211 Kenwood Ave. LYMAN, Prof. E. A. State Normal School, Ypsilanti, Mich. 126 N. Washing­

ton St. LYNCH, Prof. D. J. Boston Coll., Chestnut Hill, Mass. LYTLE, Asst. Prof. E. B. Univ. of Illinois, Urbana, 111. 903 S. Busey Ave. MCALISTER, Prof. E. H. Univ. of Oregon, Eugene, Ore. 334 Pearl St. MCCAIN, Prof. GERTRUDE I. Westminster Coll., New Wilmington, Pa. MCCLENON, Prof. R. B. Grinnell Coll., Grinnell, la. MCCORMICK, J. T. Boston Coll,, Chestnut Hill, Mass. MCDONNELL, JOHN. Care of J. P. Finn, 1972 Honeywell Ave., Bronx, New York,

N. Y. MCEWEN, Dr. G. F. Scripps Institution, La Jolla, Calif. Box 68. MCGAW, Prof. F. M. Cornell Coll., Mount Vernon, la. MCGIFFERT, Asst. Prof. JAMES. Rensselaer Polytechnic Inst., Troy, N. Y. 169

Sth St. MCHUGH, DEAN P. J. Boston Coll., Chestnut Hill, Mass. MCKELVEY, Asso. Prof. J. V. Iowa State Coll., Ames, la. Lock Box 232, Sta­

tion A. MCKELVEY, MARTHA M. (Mrs. J. V.). Instr., Iowa State Coll., Ames, la. MCKINNEY, Prof. T. E. Univ. of South Dakota, Vermillion, S. Dak. MCMACKIN, Dr. F. J. 49 Vreeland Ave., Rutherford, N. J. MCMILLAN, Prof. MARY B. State Normal School, River Falls, Wis. 334 3d

Ave., E.t Wisconsin Rapidst Wis.

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MCNEAL, R. L. 1811 E. 90th St., Cleveland, O. MCNEILL, Prof. MALCOLM. Lake Forest Coll., Lake Forest, 111. •MACAIILAY. Dr. F. S. The Chesters, Vicarage Rd., East Sheen, London, S. W.,

England. MACCOLL, LER. A. Western Electric Co., 463 West St., New York, N. Y. MACDUFFEE, Dr. C. C. Instr., Prnceton Univ., Princeton, N. J. 26 Murray PI. MACINNESS, Asst. Prof. C. R. Princeton Univ., Princeton, N. J. MACKENZIE, Prof. M. A. Univ. of Toronto, Toronto, Canada. MACLEAN, J. B. Mutual Life Insurance Co., 32 Nassau St., New York, N. Y. MACLEAN, Prof. N. B. Univ. of Manitoba, Winnipeg, Canada. MACMILLAN, ASSO. Prof. W. D. Univ. of Chicago, Chicago, 111. MACNEISH. Asst. Prof. H. F. Coll. of the City of New York, New York, N. Y.

185 Lakeview Ave.. Tuckahoe, N. Y. MACPHERSON. D. H. Brown Univ., Providence, R. I. MADDISON. Dr. ISABEL. Recording Dean, Bryn Mawr Coll., Bryn Mawr, Pa. MADDOX. Prof. A. C. Louisiana State Normal Coll., Natchitoches, La. 180

Jefferson St. MAIZLISH, ISRAEL. Instr., Univ. of Minnesota. Minneapolis. Minn. MALLORY, V. S. High School, East Orange, N. J. MALTBIE, Dr. W. H. Attorney at Law. 911 Continental Bldg., Baltimore, Md. •MANNING, Asso. Prof, H. P. Brown Univ., Providence. R. I. MANNING, Prof. W. A. Stanford Univ., Stanford University, Calif. 604 Tennyson

Ave., Palo Alto. Calif. MANSON, Asso. Prof. E. S. Ohio State Univ., Columbus, 0. MARCH, ASSO. Prof. H. W. Univ. of Wisconsin, Madison, Wis. 115 Summit Ave. MARKLEY, Prof. J. L. Univ. of Michigan, Ann Arbor, Mich. 1816 Geddes Ave. MARRIOTT, Asst. Prof. R. W. Swarthmore Coll., Swarthmore, Pa. 213 La­

fayette Ave. MARSHALL, Prof. WILLIAM. Purdue Univ., Lafayette, Ind. 1017 State St. MARTIN, Asso. Prof. EMILIE N. Mount Holyoke Coll., South Hadley, Mass. MARTIN, Prof. L. A. Stevens Inst, of Technology, Hoboken, N. J. 911 Castle

Point Terrace. •MASON, Prof. MAX. Univ. of Wisconsin, Madison, Wis. MASON, Asso. Prof. T. E. Purdue Univ., Lafayette, Ind. 103 Waldron St. MATHESON, Prof. JOHN. Queen's Univ., Kingston, Ontario, Canada. MATHEWS, Asst. Prof. R. M. Wesleyan Univ., Middletown, Conn. MATHEWSON, Asst. Prof. L. C. Dartmouth Coll., Hanover, N. H. MEACHAM, ASSO. Prof. E. D. Univ. of Oklahoma, Norman, Okla. MEAD, F. B. Lincoln National Life Insurance Co., Fort Wayne, Ind. MELCHER, GEORGE. Library Bldg., Kansas City, Mo. MENDIZÂBAL-TAMBORREL, Prof. JOAQUIN DE. 5a Manuel Doblado No. 67, Mexico

D. F., Mexico. MENSENKAMP, L. E. High School, Freeport, 111. 521 W. Cottonwood St MERRIAM, FRANCES M. Instr., Wellesley Coll., Wellesley, Mass. MERRILL, Asso. Prof. A. S. Univ. of Montana, Missoula, Mont. •MERRILL, Prof. HELEN A. Wellesley Coll., Wellesley, Mass. MERRIMAN, Dr. MANSFIELD. Engineer. 1071 Madison Ave., New York, N. Y. •METZLER, Prof. W. H. Syracuse Univ., Syracuse, N. Y. R. F. D. 1, Fayette-

ville. N. Y. MICHIE, Adj. Prof. J. N. Univ. of Texas, Austin, Tex. 2618 Rio Grande St. MILES, Asst. Prof. E. J. Yale Univ., New Haven, Conn. 87 Marvel Rd. MILLAY, IDA C. Instr., New Hampshire Coll., Durham, N. H. MILLER, Dr. A. L. 25 Clinton Rd., Brookline, Mass. MILLER, Prof. BESSIE I. Rockford Coll., Rockford, 111. MILLER, E. A. 113 N. Tioga St., Ithaca, N. Y.

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MILLER, E. B. Instr., Univ. of Wisconsn, Madison, Wis. 203 N. Frances St. *MILLER, Prof. G. A. Univ. of Illinois, Urbana, 111. 1203 W. Illinois St. MILLER, Asso. Prof. I. L. South Dakota State Coll., Brookings, S. Dak. Box 105,

Station A. MILLER, Prof. J. A. Swarthmore Coll., Swartbmore, Pa, MILLER, Asso. Prof. NORMAN. Queen's Univ., Kingston, Ontario, Canada. MILLS, Prof. C. N. Heidelberg Univ., Tiffin, O. 138 Ann St. MILLS, VICENTE, Bureau of Lands, Manila, P. I. Box 2442. MILNE, E. L. Lake Forest Academy, Lake Forest, 111. MILNE, T. H. Lecturer, Univ. of Alberta, Edmonton, Canada. MILNE, Prof. W. E. Univ. of Oregon, Eugene, Ore. MIRICK, G. R. Scarborough School, Scarborough, N. Y. 5 Churchill St., Ossin*

ing, N. Y. MISER, Asso. Prof. W. L. Armour Inst., of Technology, Chicago, 111. MITCHELL, Prof. B. E. Millsaps Coll., Jackson, Miss. 727 Arlington Ave. MITCHELL, Prof. H. B. Columbia Univ., New York, N. Y. 80 Washington Sq. MITCHELL, Prof. H. H. Univ. of Pennsylvania, Philadelphia, Pa. College Hall. MITCHELL, Prof. U. G. Univ. of Kansas, Lawrence, Kan. 1313 Massachusetts

St. MOIR, HENRY. Home Life Insurance Co., 256 Broadway, New York, N. Y. MOLINA, E. C. American Telephone and Telegraph Co., 195 Broadway, New

York, N. Y. MOODY, Prof. W. A. Bowdoin Coll., Brunswick, Me. 60 Federal St. MOORE, Asso. Prof. C. L. E. Massachusetts Inst, of Technology, Cambridge, Mass. MOORE, Asso. Prof. C. N. Univ. of Cincinnati, Cincinnati, O. 219 Woolper

Ave. *MOORE, Prof. E. H. Univ. of Chicago, Chicago, 111. 5607 Kenwood Ave. MOORE, ASSO. Prof. R. L. Univ. of Texas, Austin. Tex. MOOTS, Prof. E. E. Cornell Coll., Mount Vernon, la. 824 Summit Ave. MOREHEAD, Asst. Prof. J. C. Carnegie Inst, of Technology, Pittsburgh, Pa. MORENO. Asso. Prof. H. C. Stanford Univ., Stanford University, Calif. Box

894. MORENUS, Prof. EUGENIE M. Sweet Briar Coll., Sweet Briar, Va. MORGAN, Dr. F. M. Clark School, Hanover, N. H. MORITZ, Prof. R. E. Univ. of Washington, Seattle, Wash. 4705 21st Ave.,

N.E. MORLEY, Prof. FRANK. Johns Hopkins Univ., Baltimore, Md. MORLEY, Prof. R. K. Worcester Polytechnic Inst., Worcester, Mass. MORRIS, E. B. Travelers Insurance Co., Hartford, Conn. MORRIS, Prof. F. R. State Teachers' and Junior Coll., Fresno, Calif. MORRIS, Prof. RICHARD. Rutgers Coll., New Brunswick, N. J. 76 Lincoln

Ave. MORRIS, W. O. North American Life Insurance Co., 36 S. State St., Chicago, 111. MORRISON, MONTFORD. Acme-International Co., 341 W. Chicago Ave., Chicago,

111. MORROW. E. B. Gilman Country School, Roland Park, Baltimore, Md. MORSE, D. S. Instr., Cornell Univ., Ithaca, N. Y. 502 Dryden Rd. MORSE, Asst. Prof. H. C. M. Cornell Univ., Ithaca, N. Y. 7 Central Ave. MOULTON, Prof. E. J. Northwestern Univ., Evanston, 111. 909 Colfax St. MOULTON, Asso. Prof. F. R. Univ. of Chicago, Chicago, 111. MUEHLMAN, Asso. Prof. PAUL. Marquette Univ., Milwaukee, Wis. 1115 Grand

Ave. MUIR, Sir THOMAS. Elmcote, Rondebosch, South Africa. •MUKHOPÂDHYÂY, Sir ASUTOSH. Univ. of Calcutta, Calcutta, India. 77 Russa

Road, N.f Bhowanipur, Calcutta.

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MuLLEMEisTER, Dr. HERMANCE. Associate, Univ. of Washington, Seattle, Wash. MULLIKEN, Dr. ANNA M. William Penn High School, Philadelphia, Pa. 421

Earlham Terrace. MULLINS, Asst. Prof. G. W. Barnard Coll., Columbia Univ., New York, N. Y. MURNAGHAN, Asso. Prof. F. D. Johns Hopkins Univ., Baltimore, Md. MURPHY, R. D. Equitable Life Assurance Society, 120 Broadway, New York,

N. Y. MURRAY, Prof. D. A. McGill Univ., Montreal, Canada. MURRAY, F. H. Instr., Univ. of West Virginia, Morgantown, W. Va. 130 Hough

St. MUSSELMAN, Dr. J. R. Associate, Johns Hopkins Univ., Baltimore, Md. MYERS, Prof. G. W. Univ. of Chicago, Chicago, 111. 1953 E. 12d. St.

NAESS, Dr. ALMAR. Docent, Naval Academy of Norway, Horten, Norway. NASSAU, Asst. Prof. J. J. Case School of Applied Science, Cleveland, Ohio. NEIKIRK, Asst. Prof. L. I. Univ. of Washington, Seattle, Wash. 4725 21$*

Ave., N. E. NELSON, Asst. Prof. A. L. Univ. of Michigan, Ann Arbor, Mich. 1208 Olivia

Ave. NELSON, Dr. C. A. Associate, Johns Hopkins Univ., Baltimore, Md. NEWCOMER, Dr. H. S. 7th and Lombard Sts., Philadelphia, Pa. NEWKIRK, Dr. B. L. General Electric Co., Schenectady, N. Y. NEWSON, Prof. MARY W. (Mrs. H. B.). Eureka Coll., Eureka, 111. NICHOLS, Dr. H. W. Western Electric Co., 463 West St., New York, N. Y. NOBLE, Prof. C. A. Univ. of California, Berkeley, Calif. 2224 Piedmont Ave. NORTHCOTT, Asst. Prof. J. A. Columbia Univ., New York, N. Y. NOBWOOD, C. E. 2 Greenwood Sq., Hyde Park, Boston, Mass. NOWLAN, Asst. Prof. F. S. Univ. of Manitoba, Winnipeg, Canada.

O'BRIEN, Dean ALBERT. St. Bonaventure's Coll., St. Bonaventure, N. Y. ODELL, L. S. Brooklyn Technical High School, Brooklyn, N. Y. OGBURN, Prof. J. H. Lehigh Univ., South Bethlehem, Pa. 715 Ave. E., Bethle­

hem. OGLESBY, Asst. Prof. E. J. New York Univ., New York, N. Y. 202 8. ISth

St., Flushing, N. Y. OLDS, Prof. G. D. Amherst Coll., Amherst, Mass. OLSON, H. L., Instr., Univ. of Michigan, Ann Arbor, Mich. 517 Linden St OSBORN, J. O. Instr., Cornell Univ., Ithaca, N. Y. 418 E. Seneca St. OSBORNE, Prof. G. A. Massachusetts Inst, of Technology, Cambridge, Mass.

249 Berkeley St., Boston. OSGOOD, Prof. W. F. Harvard Univ., Cambridge, Mass. 74 Avon Hill St. O'SHAUGHNESSY, Prof. Louis. Virginia Polytechnic Inst., Blacksburg, Va.

Box 177. OWENS, Asst. Prof. F. W. Cornell Univ., Ithaca, N. Y. 110 Westbourne Lane. OWENS, Dr. HELEN B. (Mrs. F. W.). Instr., Cornell Univ., Ithaca, N. Y. 110

Westbourne Lane.

PAASWELL, GEORGE. Engineer. 212 W. Fordham Rd., New York, N. Y. PACKER, MARGARET C. Instr., Hood Coll., Frederick, Md. PAGE, Prof. J. M. Univ. of Virginia, University, Va. PAGE, Prof. LEIGH. Yale Univ., New Haven, Conn. Sloane Physics Labora­

tory. PALMER, Asso. Prof. C. I. Armour Inst, of Technology, Chicago, 111.

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PALMER, E. S. Winchester Repeating Arms Co., New Haven, Conn. 42 Col­lege SU

PALMIÉ, Prof. ANNA H. College for Women, Western Reserve Univ., Cleve­land, O.

PAPPS, P. C. H. Mutual Benefit Life Insurance Co., Newark, N. J. PARKER, F. A. Instr., West Virginia Collegiate Inst., Institute, W. Va. PARSONS, C. H. The Hill School, Pottstown, Pa. •PARTRIDGE, Dr. E. A. West Philadelphia Boys' High School, 48th and Walnut

Sts., Philadelphia, Pa. PATTEN, Prof. W. E. Tangshan Coll., Tangshan, North China. PATTENGILL, Asso. Prof. E. A. Iowa State Coll., Ames, la. 504 Ash Ave. PATTERSON, Dr. J. L. Chestnut Hill Academy, Chestnut Hill, Pa. PATTILLO, Prof. N. A. Randolph-Macon Woman's Coll., Lynchburg, Va. PEABODY, L. E. Instr., Yale Univ., New Haven, Conn. 34 N. Sheffield Hall. PEED, Prof. M. T. Emory Univ., Emory University, Ga. PEGRAM, Prof. ANNIE M. Greensboro Coll., Greensboro, N. C. PEHRSON, Asst. Prof. E. W. Univ. of Utah, Salt Lake City, Utah. PELL, ASSO. Prof. ANNA J. (Mrs. ALEXANDER). Bryn Mawr Coll., Bryn Mawr, Pa.

Yarrow W., Bryn Mawr. PEPPER, ECHO D. Univ. of Washington, Seattle, Wash. 1407 ZSth Ave. PERKINS, Prof. L. R. Middlebury Coll., Middlebury, Vt. PERRIN, O. W. Penn Mutual Life Insurance Co., 6th and Walnut Sts., Philadel­

phia, Pa. PFEIFFER, Dr. G. A. Instr., Columbia Univ., New York, N. Y. 56 Anderson Ave,,

Palisade, N. J. PHILLIPS, Asst. Prof. H. B. Massachusetts Inst, of Technology, Cambridge, Mass. PHIPPS, C. G., Univ. of Minnesota, Minneapolis, Minn. 986 15th Ave., S. E. PIERCE, Asst. Prof. T. A. Univ. of Nebraska, Lincoln, Neb. 1718 Pepper Ave. PIERPONT, Prof. JAMES. Yale Univ., New Haven, Conn. 42 Mansfield St. PITCHER, Prof. A. D. Adelbert Coll., Western Reserve Univ., Cleveland, 0. PLANT, Prof. L. C. Michigan Agric. Coll., East Lansing, Mich. PLANTE, Prof. J. R. Viator Coll., Bourbonnais, 111. PLAPP, Asst. Prof. ELSIE M. Hollins Coll., Hollins, Va. PLIMPTON, Dr. G. A. Ginn and Co., 70 5th Ave., New York, N. Y. POOLER, L. G. Columbia Univ., New York, N. Y. Fayerweather Hall. POOR, Prof. C. L. Columbia Univ., New York, N. Y. 35 E. mth St. POOR, Prof. J. M. Dartmouth Coll., Hanover, N. H. POOR, Asst. Prof. V. C. Univ. of Michigan, Ann Arbor, Mich. 930 Packard St. PORITSKY, HILLEL. Instr., Cornell Univ., Ithaca, N. Y. 212 Linden Ave. PORTER, C. S. Instr., Worcester Polytechnic Inst , Worcester, Mass. 62 Wachu-

sett St. PORTER, Prof. M. B. Univ. of Texas, Austin, Tex. POSEY, F. D. Apartado 2413, Mexico, D. F., Mexico. POST, Dr. E. L. Instr., Columbia Univ., New York, N. Y. POUNDER, Asst. Prof. I. R. Univ. of Toronto, Toronto, Canada. *PO\7ERS, R. E. Treasurer's Office, Denver & Rio Grande R. R. Co., Denver, Colo. PRASAD, Prof. GANESH. Benares Hindu Univ., Benares, India. PRESS, ABRAHAM. Radio Engineer. 219 Dorset Ave., Chevy Chace, Md. PRETZ, Prof. P. S. St. Benedict's Coll., Atchison, Kan. •PUPIN, Prof. M. I. Columbia Univ., New York, N. Y. PUTNAM, Prof. T. M. Univ. of California, Berkeley, Calif. PUTNAM, W. L. Attorney at Law. 60 State St., Boston, Mass. RAGSDALE, Dr. VIRGINIA. Associate, State Normal Coll., Greensboro, N. C.

Jamestown, N. C.

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RAMBO, Asst. Prof. SUSAN M. Smith Coll., Northampton, Mass. 11 Barrett PI RAMSDELL, Prof. G. E. Bates Coll., Lewiston, Me. RANDALL, Prof. O. E. Brown Univ., Providence, R. I. RANKIN, Prof. J. M. Coll. of Idaho, Caldwell, Id. Box 97, R. F. D. 4. RANKIN, Prof. W. W. Agnes Scott Coll., Decatur, Ga. RANSOM, Prof. W. R. Tufts Coll., Tufts College 57, Mass. RANUM, Asst. Prof. ARTHUR. Cornell Univ., Ithaca, N. Y. 3 Central Ave. RASOR, Prof. S. E. Ohio State Univ., Columbus, 0. 1594 Neil Ave. RAYNOR, G. E. Instr., Princeton Univ., Princeton, N. J. 31 William St. REAVES, Prof. S. W. Univ. of Oklahoma, Norman, Okla. RECHARD, 0. H. Instr., University of Wisconsin, Madison, Wis. 1339 Mound St. •REDDICK, Prof. H. W. Cooper Union, New York, N. Y. REED, Dr. F. W. Instr., Cornell Univ., Ithaca, N. Y. 320 Elmwood Ave. REED, ASSO. Prof. L. J. John Hopkins Univ., Baltimore, M. D. 312 W. Monu­

ment St. REHM, Capt. H. W. 19 Harris St., Brookline, Mass. REID, Prof. L. W. Haverford Coll., Haverford, Pa. REILLY, ASSO. Prof. J. F. State Univ. of Iowa, Iowa City, la. 212 Physics

Bldg. REILLY, MARION. 2015 de Lancey PL, Philadelphia, Pa. REMICK, Prof. B. L. State Agric. Coll., Manhattan, Kan. 613 Houston St. REYNOLDS, Asst. Prof. C. N., Jr. Univ. of West Virginia, Morgantown, W. Va.

659 Jones Ave. REYNOLDS, ASSO. Prof. F. G. Coll. of the City of New York, New York, N. Y. RHODES, E. E. Mutual Benefit Life Insurance Co., 750 Broad St., Newark, N. J. RICE, Prof. C. D. Univ. of Texas, Austin, Tex. 105 W. 26th St. RICE, C. M. 19 Pearl St., Worcester, Mass. RICE, Asst. Prof. HARRIS. Worcester Polytechnic Inst., Worcester, Mass. RICE, L. H. Instr., Massachusetts Inst, of Technology, Cambridge, Mass. Room

2-271. RICHARDSON, Prof. A. V. Bishop's College, Lennoxville, Quebec, Canada. RICHARDSON, M. R. 618 McMannen St., Durham, N. C. •RICHARDSON, Prof. R. G. D. Brown Univ., Providence, R. I. •RICHMOND, H. W. Fellow and Lecturer, King's Coll., Cambridge, England. RIDER, ASSO. Prof. P. R. Washington Univ., St. Louis, Mo. RIETZ, Prof. H. L. State Univ. of Iowa, Iowa City, la. Physics Hall. RIETZ, J. C. Actuary. 1107 Huntington Bank Bldg., Columbus, O. RIGGS, Prof. N. C. Carnegie Inst, of Technology, Pittsburgh, Pa. RILEY, Prof. J. L. Junior Agric. and Mech. Coll., Stephenville, Tex. RISLEY, Prof. W. J. Colorado School of Mines, Golden, Colo. RITT, Asst. Prof. J. F. Columbia Univ., New York, N. Y. 1446 59to St., Brook­

lyn, N. Y. ROA, EMETERIO. Philippine Government Student, Univ. of Michigan, Ann Arbor,

Mich. 209 S. Thayer St. ROBBINS, Asst. Prof. R. B. Univ. of Michigan, Ann Arbor, Mich. 1113 Fer-

don Rd. ROBERT, ASSO. Prof. H. M. U. S. Naval Academy, Annapolis, Md. 214 Prince

George St. ROBERTS, Prof. MARIA M. Iowa State Coll., Ames, la. 219 Ash Ave. ROBINSON, L. B. 306 E. 22d St., Baltimore, Md. ROBISON, Dr. G. M. Instr., Cornell Univ., Ithaca, N. Y. White Hall. RODGERS, Prof. T. G. New Mexico Normal Univ., Las Vegas, N. Mex. 1018

Ath St., East Las Vegas. •ROE. Prof. E. D., Jr. Syracuse Univ., Syracuse, N. Y. 123 W. Ostrander Ave.

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• R O E , Dr. J O S E P H I N E R. (Mrs. E. D. ) . 123 W. Ostrander Ave., Syracuse, N. Y. ROEVER, Prof. W. H. Wash ing ton Univ., St. Louis, Mo. ROMAN, Dr. I R W I N . Instr . , Nor thwes te rn Univ., Evanston, 111. 716 Clarke St. ROOSEVELT, G. E. 30 P ine St., New York, N. Y. ROOT, Prof. R. E. U. S. Naval Academy, Annapolis , Md. 7 Franklin St. RORER, Dr. J . T. Wil l iam Penn High School, Philadelphia, Pa. 333 N. 34*7t St. ROSENBACH, J . R. Instr . , Carnegie Inst , of Technology, P i t t sburgh , Pa. 5728

Baum Blvd. ROSENBAUM, Dr. J O S E P H . Instr . , Milford School, Milford, Conn. Bloomfleld,

Conn. R O T H , W. E. 829 67th Ave., West Allis, Wis. ROTHROCK, Prof. A. D. Ind iana Univ., Bloomington, Ind. 1000 Ativater Ave. ROUSE, Asst. Prof. L. J . Univ. of Michigan, Ann Arbor, Mich. 1137 Michi­

gan Ave. ROWE, Prof. J . E. Coll. of Wil l iam and Mary, Wil l iamsburg, Va. ROWLAND, ASSO. Prof. S. A. Union Coll., Schenectady, N. Y. RUGER, Asst. Prof. H. A. Teachers ' Coll., Columbia Univ., New York, N. Y. 41

Claremont Ave. RUNGE, Asst. Prof. L U L U . Univ. of of Nebraska, Lincoln, Neb. R U N N I N G , Prof. T. R. Univ. of Michigan, Ann Arbor, Mich. 1019 Michigan

Ave. R U S K , Prof. W. J. Grinnell Coll., Grinnell , la . 1415 Park St. RUSSELL, Asso. Prof. W. P. Pomona Coll., Claremont, Calif. RUTLEGE, Dr. GEORGE. Instr . , Massachuset ts Inst , of Technology, Cambridge,

Mass. 28 Chatham St.

SAFFORD, Prof. F . H. Univ. of Pennsylvania , Phi ladelphia, Pa. SAKELLARIU, Prof. N I L O S . Univ. of Athens , Athens,- Greece. Rue Asklipiou 96. SAUREL, Prof. P. L. Coll. of the City of New York, New York, N. Y. SCARBOROUGH, Asst. Prof. J . B. U. S. Naval Academy, Annapolis , Md. Box

332. SCARBOROUGH, Prof. J . H. S ta te Normal School, Warrensburg , Mo. SCHMIDT, Prof. P. G. St. Olaf Coll., Northfield, Minn. *SCHMIEDEL, Prof. OSCAR. Nebraska Wesleyan Univ., Universi ty Place, Neb.

Box 223. SCHOONMAKER, Prof. H A Z E L E. Western Coll. for Women, Oxford, O. SCHOTTENFELS, IDA M. 5521 Kimbark Ave., Chicago, 111. SCHUYLER, ELMER. Bay Ridge High School, 67th St. and 4th Ave., Brooklyn,

N. Y. SCHWATT, Prof. I. J . Univ. of Pennsylvania , Phi ladelphia, Pa. 1226 S. 58*ft

St. SCHWEITZER, Dr. A. R. 452 Oakdale Ave., Chicago, 111. SCOTT, Prof. CHARLOTTE A. Bryn Mawr Coll., Bryn Mawr, Pa. 233 Rooerts Rd. SEELY, Dr. CAROLINE E. 501 W. 116th St., New York, N. Y. SÉGUIER, Rev. J . DE. 114 rue du Bac, Pa r i s , 7e, F rance . SEIDLIN, Prof. J O S E P H . Alfred Coll., Alfred, N. Y. SELLEW, Prof. G. T. Knox Coll., Galesburg, 111. SHAFFER, LEONARD. Inst r . , New Hampsh i re Coll., Durham, N. H. S H A N E , Dr . . C. D. Instr . , Univ. of California, Berkeley, Calif. 1111 Fresno

Ave. SHARPE, Prof. F . R. Cornell Univ., I thaca, N. Y. 122 College Ave. S H A U B , H. C. Instr . , H a r v a r d Univ., Cambridge, Mass. 26 Conant Hall. S H A W , Prof. J . B. Univ. of Il l inois, Urbana, 111. Box 644, Station A, Cham­

paign, 111.

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SHEETS, Asst. Prof. R. A. Denison Univ., Granville, 0. SHELDON, Prof. E. W. Univ. of Alberta, Edmonton, Canada. SHELLEY, MARGARET A. Instr., Coll. of St. Catherine, Minneapolis, Minn. 2867

James Ave. SHEPPARD, N. E. Lecturer, Univ. of Toronto, Toronto, Canada. SHERER, C. R. Instr., Univ. of Nebraska, Lincoln, Neb. SHERK, Prof. W. H. Univ. of Buffalo, Buffalo, N. Y. 367 W. Delevan Ave. SHERWOOD, Asso. Prof. G. E. F. Southern Branch, Univ. of California, Los An­

geles, Calif. 1319 Lucille Ave. SHEWHART, W. A. Western Electric Co., 463 West St., New York, N. Y. SHIVELY, Prof. L. S. Mount Morris Coll., Mount Morris, 111. SHOEMAKER, Prof. H. M. North East High School, Philadelphia, Pa. 1906 N.

Uth St. SHORT, JESSIE M. Instr., Reed Coll., Portland, Ore. SHORT, R. L. 1313 Hébert St., St. Louis, Mo. SHOWMAN, Asst. Prof. H. M. Southern Branch, Univ. of California, Los Angeles,

Calif. 855 N. Vermont Ave. SHUGERT, Asst. Prof. S. P. Univ. of Pennsylvania, Philadelphia, Pa. Box 13,

College Hall. SHUMWAY, ASSO. Prof. R. R. Univ. of Minnesota, Minneapolis, Minn. 3844

Thomas Ave., S. SICELOFF, Asst. Prof. L. P. Columbia Univ., New York, N. Y. SILVERMAN, Asst. Prof. L. L. Dartmouth Coll., Hanover, N. H. SIMMONS, H. A. Instr., Univ. of Michigan, Ann Arbor, Mich. 732 Forest Ave. SIMON, L. G. Statistician. 120 Broadway, New York, N. Y. SIMON, Asst. Prof. W. G. Western Reserve Univ., Cleveland, Ohio. SIMONDS, Dr. E. F. "Adair," Lamrock Ave., Bondi, New South Wales, Australia. SIMPSON, Prof. C. G. Coll. of Engineering, Milwaukee, Wis. 681 31st St. SIMPSON, P ro t T. M. Univ. of Florida, Gainesville, Ma. 311 W. Church St. SIMPSON, Prof. T. McN., Jr. Randoiph-Macon Coll., Ashland, Va. biNuLAiR, Asso. Prof. MARY E. Oberim Coll., Oberlin, U. *SISAM, Prof. C. H. Colorado Coll., Coioraao Springs, Colo. 311 E. San Rafael

St. SKILES, Prof. W. V. Georgia School of Technology, Atlanta, Ga. 306 Myrtle

St. SKINNER, Prof. E. B. Univ. of Wisconsin, Madison, Wis. 210 Lathrop St. SLAUGHT, Prof. H. E. Univ. of Chicago, Chicago, 111. 5548 Kenwood Ave. SLEPIAN, Dr. JOSEPH. Research Bldg., Westinghouse Company, East Pittsburgh,

Pa. •SLICHTER, Prof. C. S. Univ. of Wisconsin, Madison, Wis. 636 N. Francis St. SLOBIN, Prof. H. L. New Hampshire Coll., Durham, N. H. SLOCTEMYER, Prof. H. F. St. Louis Univ., St. Louis, Mo. SLOCUM, Dr. S. E. Engineer. 301 Harrison Bldg, Philadelphia, Pa. SMAIL, Asst. Prof. L. L. Univ. of Washington, Seattle, Wash. 2121 E. 55M

St. SMITH, Prof. A. W. Colgate Univ., Hamilton. N. Y. •SMITH, Asso. Prof. CLARA E. Wellesley Coll., Wellesley, Mass. 14 Waoan St. *SMITH, Prof. D. E. Teachers Coll., Columbia Univ., New York, N. Y. 525 W.

125th St. SMITH, Asso. Prof. D. M. Georgia School of Technology, Atlanta, Ga. SMITH, Prof. EDWIN R. Iowa State Coll., Ames, la. Room 218 Central. SMITH, EUGENE R. Beaver Country Day School, Brookline, Mass. SMITH, Asst. Prof. GERTRUDE. Vassar Coll., Poughkeepsie, N. Y. SMITH, Asst. Prof. G. W. Univ. of Kansas, Lawrence, Kan. 917 Maine St. SMITH, HELEN F. Instr., Iowa State Coll., Ames, la. 113 Welch Ave.

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SMITH, Prof. H. L. Univ. of the Philippines, Manila, P. I. SMITH, Asst. Prof. I. W. North Dakota Agric. Coll., Fargo, N. Dak. 1126 lZth

St., N. SMITH, Prof. M. G. Greenville Coll., Greenville, 111. 624 N. Locust St. SMITH, Prof. P. F. Sheffield Scientific School, Yale Univ., New Haven, Conn.

330 Willow St. SMITH, Prof. SARAH E. Mount Holyoke Coll., South Hadley, Mass. SMITH, SINCLAIR. California Inst, of Technology, Pasadena, Calif. 102 N.

Michigan Ave. SMITH, Prof. W. M. Lafayette Coll., Easton, Pa. SNEDECOR, ASSO. Prof. G. W. Iowa State Coll., Ames, la. 807 Hodge Ave. SNELLING, Prof. C. M. Univ. of Georgia, Athens, Ga. Box 283. SNOOK, T. E. Architect and Engineer. 261 Broadway, New York, N. Y. SNYDER, Asst. Prof. A. D. Union Coll., Schenectady, N. Y. 8Q2 Union St. SNYDER, Prof. M. B. Central High School, Philadelphia, Pa. I l l Orandview

Ave., Ardmore, Pa. SNYDER, Prof. VIRGIL. Cornell Univ., Ithaca, N. Y. 214 University Ave. SOLT, M. R. Instr., Lehigh Univ., South Bethlehem, Pa. 124 W. 4th St.,

Bethlehem. SOMMERVILLE, Prof. D. M. Y. Victoria Univ. Coll., Wellington, New Zealand. SOSNOW, G. Y. Prudential Insurance Co., Newark, N. J. 99 Howard St. SPARROW, Prof. C. M. Univ. of Virginia, University, Va. SPEEKER, ASSO. Prof. G. G. Michigan Agric. Coll., Last Lansing, Mich. SPENCER, Prof. MARY C. Newcomb Coll., Tulane Univ., New Orleans, La. SPERRY, Prof. C. S. Univ. of Colorado, Boulder, Colo. 1605 Hillside Rd. SPERRY, MAY J. Instr., Syracuse Univ., Syracuse, N. Y. SPERRY, Dr. PAULINE. Instr., Univ. of California, Berkeley, Calif. 1421 Haw­

thorne Terrace. STAGER, Dr. H. W. Instr., Univ. of Washington, Seattle, Wash. 4729 10th Ave.,

N.E. •STECKER, Prof. H. F. Pennsylvania State Coll., State College, Pa. Highland

Ave. and Miles St. STEED, Asst. Prof. D. V. Univ. of Southern California, Los Angeles, Calif. STEIMLEY, Dr. L. L. Instr., Univ. of Illinois, Urbana, 111. 1008 W. Green St. STEINMETZ, Prof. C. P. Union Coll., Schenectady, N. Y., and General Electric Co.

Wendell Ave. STEPHENS, EUGENE. Instr., Washington Univ., St. Louis, Mo. 5863 Bartmer

Ave. STEPHENS, Prof. R. P. Univ. of Georgia, Athens, Ga. *STETSON, Dr. J. M. Instr., Univ. of Illinois, Urbana, 111. 1008 W. Green St. STICKNEY, ELIZABETH E. (Mrs. F. S.). Indio, Riverside Co., Calif. STOCKER, ASSO. Prof. J. E, Lehigh Univ., South Bethlehem, Pa. 746 Linden

St., Bethlehem. STONE, Prof. ORMOND. Univ. of Virginia, University, Va. Clifton Station, Va. STONE, Asso. Prof. R. B. Purdue Univ., Lafayette, Ind. 307 Russell St.,

West Lafayette. STORY, Prof. W. E. Clark Univ., Worcester, Mass. 17 Hammond St. STOUFFER, Prof. E. B. Univ. of Kansas, Lawrence, Kan. 1019 Maine St. STOUGHTON, LEILA R. 270 Everit St., New Haven, Conn. STROMQUIST, Prof. C. E. Univ. of Wyoming, Laramie, Wyo. STRONG, Dr. W. M. Mutual Life Insurance Co., 32 Nassau St., New York, N. Y. SUFFA, Prof. MARY C. Elmira Coll., Elmira, N. Y. SULLIVAN, Asst. Prof. C. T. McGill Univ., Montreal, Canada, Engineering Bldg. SUN, Asst. Prof. JUNG. Peking Academy, M. E. Mission, Peking, China. SWARTZEL, Prof. K. D. Univ. of Pittsburgh, Pittsburgh, Pa. 4360 Center Ave.

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•SWIFT, Prof. ELIJAH. Univ. of Vermont, Burlington, Vt. 415 S. Willard SU SWIFT, F. E. 229 W. Pontiac St., Fort Wayne, Ind. SYNGE, ASSO. Prof. J. L. Univ. of Toronto, Toronto, Canada.

*TABER, Prof. HENRY. Clark Univ., Worcester, Mass. 2 Pleasant PI. *TANNER, Prof. J. H. Cornell Univ., Ithaca, N. Y. TANOUE, J. I. 33 Arden St., New York, N. Y. TANZOLA, J. J. Pension Division, Department of Finance, New York, N. Y. 162

$th St., Brooklyn, N. Y. TAPPAN, Asso. Prof. A. HELEN, Iowa State Coll., Ames, la. 2402 Lincoln Way. TAYLOR, Prof. EUGENE. Univ. of Idaho, Moscow, Id. 725 S. Jefferson St. TAYLOR, Dr. E. H. Instr., Eastern State Normal School, Charleston, 111. TAYLOR, Prof. F. J. Coll. of St. Thomas, St. Paul, Minn. TAYLOR, J. H. Univ. of Chicago, Chicago, 111. Apt. 23, 6124 South Park Ave. TAYLOR, Dr. J. S. Instr., Massachusetts Inst, of Technology, Cambridge, Mass. TEACH, V. B. Ohio State University, Columbus, 0. 2223 Neil Ave. TERRILL, H. M. Columbia Univ., New York, N. Y. 160 Seminary Ave., Rail­

way, N. J. THEOBOLD, Prof. JOHN. Columbia Coll., Dubuque, la. Loras Hall. THOMAS, Prof. EVAN. Coll. of Engineering, Univ. of Vermont, Burlington, Vt. THOMAS, J. M. Instr., Univ. of Pennsylvania, Philadelphia, Pa. College Hall. THOMPSON, E. L. Junior Coll., Joliet, 111. 219 Richmond St. •THOMPSON, Prof. H. D. Princeton Univ., Princeton, N. J. 2 Morven St. THOMPSON, J. S. Mutual Life Insurance Co., 34 Nassau St., New York, N. Y. THOMPSON, Asst. Prof. W. N. Drury Coll., Springfield, Mo. 831 Benton Ave. THORNE, Asst. Prof. P. L. New York Univ., Unversity Heights, New York, N Y. TOUTON, Asso. Prof. F. C. Univ. of Southern California, Los Angeles, Calif. TOWNSEND, Prof. E. J. Univ. of Illinois, Urbana, 111. 510 John St., Champaign,

III. TRACEY, Asst. Prof. J. I. Yale Univ., New Haven, Conn. 314 Norton St. TREVOR, Prof. J. E. Cornell Univ., Ithaca, N. Y. 4 Circle. TRIPP, Prof. M. 0. Wittenberg Coll., Springfield, O. Tsu, Prof. W. S. Nanyang Railway and Mining Coll., Shanghai, China. TUDOR, Prof. J. H. Pennsylvania State Coll., State College, Pa. 138 S. Mc

Allister St. TURNER, Dr. BIRD M. Instr., Univ. of Illinois, Urbana, 111. 905 W. Illinois St TURNER, Asst. Prof. J. S. Iowa State Coll., Ames, la. 2320 Knapp St. TYLER, Prof. H. W. Massachusetts Inst, of Technology, Cambridge, Mass.

UHLER, ASSO. Prof. H. S. Yale Univ., New Haven, Conn. 320 Willow St. UNDERHILL, ASSO. Prof. A. L. Univ. of Minnesota, Minneapolis, Minn. UPTON, Asso. Prof. C. B. Teachers Coll., Columbia Univ., New York, N. Y. URNER, Dr. S. E. Box 451, Route A, Mountain View, Calif.

*VAN BENSCHOTEN, Prof. ANNA L. Wells Coll., Aurora, N. Y. VAN BUSKIRK, Prof. H. C. California Inst, of Technology, Pasadena, Calif. VAN DER VRIES, Dr. J. N. 801 Otis Bldg., Chicago, 111. VANDIVER, H. S. Instr., Cornell Univ., Ithaca, N. Y. 610 E. Buffalo St. VAN HORN, Prof. C. E. Judson Coll., Rangoon, Burma. Bradgate, la. •VAN ORSTRAND, C. E. U. S. Geological Survey and George Washington Univ.,

Washington, D. C. 1607 31st, N. W. VAN VLECK, Prof. E. B. Univ. of Wisconsin, Madison, Wis. 519 N. Pinckney St. *VEBLEN, Prof. OSWALD. Princeton Univ., Princeton, N. J.

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VEDDER, Asst. Prof. J. N. Union Coll., Schenectady, N. Y. VIVIAN, Prof. ROXANA H. Wellesley Coll., Wellesley, Mass. VOLTERRA, Prof. ViTO. University of Rome, Rome, Italy. Via in Lucina, 17.

WADDELL, MARY E. G. Univ. of Toronto, Toronto, Canada. 32 Madison Ave. WAGNER, C. C. Instr., Pennsylvania State Coll., State College, Pa. 109 E. Nit-

tany Ave. WAGNER, W. J. Instr., Purdue Univ., Lafayette, Ind. 322 Waldron St., West

Lafayette. WAHLIN, Asst. Prof. G. E. Univ. of Illinois, Urbana, 111. 607 W. Nevada St. WALKER, Prof. B. M. Mississippi Agric. and Mech. Coll., Agricultural College,

Miss. WALSH, C. M. Bellport, Long Island, N. Y. WALSH, Dr. J. L. Instr., Harvard Univ., Cambridge, Mass. 547 Widener Library. WALTON, Asst. Prof. T. O. Kalamazoo Coll., Kalamazoo, Mich. WARD, L. E. Instr., Rice Inst., Houston, Tex. 2419 Travis St. WARD, MARY B. (Mrs. L. E.). 2419 Travis St., Houston, Tex. WASHBURNE, A. C. Berkshire Life Insurance Co., Pittsfield, Mass. WATKEYS, Prof. C. W. Univ. of Rochester, Rochester, N. Y. WATSON, Prof. E. E. Iowa State Teachers Coll., Cedar Falls, la. 2100 Wal­

nut St. WATSON, Prof. G. N. Univ. of Birmingham, Edmond St., Birmingham, Eng.-

land. WEAR, ASSO. Prof. L. E, California Inst, of Technology, Pasadena, Calif. WEAVER, Asst. Prof. J. H. Ohio State Univ., Columbus, O. Hilliard, O. WEAVER, Asst. Prof. WARREN. Univ. of Wisconsin, Madison, Wis. 100 Summit

Ave. WEBB, H. E. Central High School, Newark, N. J. 12 Irving PI., Summit, N. J. WEBB, R. M. Kansas City Life Insurance Co., 700 Rialto Bldg., Kansas City,

Mo. WEBBER, Prof. W. P. 211 Poland St., Baton Rouge, La. WEBSTER, Prof. A. G. Clark Univ., Worcester, Mass. 85 William St. WECHSLER, A. L. Columbia Univ., New York, N. Y. 610 Cathedral Parkway. WEDDERBURN, ASSO. Prof. J. H. M. Princeton Univ., Princeton, N. J. Box 53. WEEKS, Dr. EULA A. Grover Cleveland High School, St. Louis, Mo. WEEKS, R. W. New York Life Insurance Co., 346 Broadway, New York, N. Y. WEIDA, F. M. Instr., State Univ. of Iowa, Iowa City, la. 109 N. Van Buren St. WEISNER, LOUIS. Columbia Univ., New York, N. Y. 27 W. 112th St. WELCH, A. A. Phoenix Mutual Life Insurance Co., Hartford, Conn. 79 Elm

St. WELLS, ASSO. Prof. MARY E. Vassar Coll., Poughkeepsie, N. Y. WELLS, Prof. R. A. Park Coll., Parkville, Mo. WESTER, Prof. C. W. State Teachers' Coll., Cedar Falls, la. 2312 Olive St. •WESTERN, Dr. A. E. 35 Essex St., Strand, London, W. C. 2, England. WESTFALL, ASSO. Prof. W. D. A. Univ. of Missouri, Columbia, Mo. 915 Uni­

versity Ave. WESTLUND, Prof. JACOB. Purdue Univ., Lafayette, Ind. 5516 Drexel Ave., Chi­

cago, III, WETZEL, R. A. Coll. of the City of New York, New York, N. Y. 218 Tecumseh

Ave., Mount Vernon, N. Y. WHEELER, Asst. Prof. J. J. Univ. of Kansas, Lawrence, Kan. WHITE, Prof. H. S. Vassar Coll., Poughkeepsie, N. Y. WHITE, ASSO. Prof. MARION B. Carleton Coll., Northfield, Minn. WHITED, Dr. WILLIS. Bridge Engineer, State Highways Dept., Harrisburg, Pa.

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WHITFORD, D. E. Instr . , Univ. of Rochester, Rochester, N. Y. 40 Vick Park B. WHITFORD, Asst. Prof. E. E. Coll. of the City of New York, New York, N. Y.

3681 Broadway. W H I T N E Y , A. W. Nat ional Workmen ' s Compensation Bureau, 120 W. 42d St.,

New York, N. Y. W H I T O N , Prof. E M M A K. Univ. of Redlands , Redlands, Calif. Casa Lorna. *WHITTAKER, Prof. E. T. Univ. of Edinburgh , Edinburgh, Scotland. 35 George

Square. *WHITTEMORE, Asst. Prof. J . K. Yale Univ., New Haven, Conn. 45 Lincoln St. W I E N E E , Dr. NORBERT. Instr . , Massachuset ts Inst , of Technology, Cambridge,

Mass. 29 Sparks St. WILCZYNSKI , Prof. E. J . Univ. of Chicago, Chicago, 111. WILDER, Asst. Prof. C. E. Dar tmouth Coll., Hanover, N. H. 5 Dana Rd. WILDER, R. L. Instr . , Univ. of Texas, Aust in, Tex. 3204 Grandview Ave. WILDES, K. L. Instr . , Massachuset ts Inst , of Technology, Cambridge, Mass. W I L E Y , Prof. F . B. Denison Univ., Granville, Ohio. WILLARD, Prof. J . M. Pennsylvania Sta te Coll., S ta te College, Pa. WILLETT, Prof. H. C. Univ. of Southern California, Los Angeles, Calif. W I L L I A M S , Dr. A, R. Instr . , Univ. of California, Berkeley, Calif. 416 Y. M.

C.A. W I L L I A M S , Prof. C. B. Kalamazoo Coll., Kalamazoo, Mich. 214 Stuart Ave. W I L L I A M S , Dr. E M I L Y C. (Mrs. W. H.) 7 E a s t 63rd St., New York, N. Y. W I L L I A M S . Prof. F . B. Clark Univ., Worcester , Mass. W I L L I A M S , Prof. J. E. Virginia Polytechnic Inst. , Blacksburg, Va. W I L L I A M S , ASSO. Prof. K. P. Ind iana Univ., Bloomington, Ind. 405 N. Indi­

ana Ave. W I L L I A M S . Asst. Prof. R. D. Ohio State Univ., Columbus, O. W I L L I A M S , Asst. Prof. W. L. G. Cornell Univ., I thaca, N. Y. White Hall WILLIAMSON, Asst. Prof. C. O. Coll. of Wooster, Wooster, 0 . 575 University

St. W I L L I S , RUBY. Instr . , Wellesley Coll., Wellesley, Mass. WILLSON, Prof. F . N. Pr inceton Univ., Pr inceton, N. J . Box 63. WILSON, Prof. A. H. Haverford Coll., Haverford, Pa . • W I L S O N , ASSO. Prof. D. T. Case School of Applied Science, Cleveland, O. W I L S O N , Prof. E. B. Harva rd School of Public Heal th , Boston, 17, Mass. W I L S O N , ELIZABETH W. 316 B St., S. E., Washington, D. C. W I L S O N , Prof. H. A. Rice Inst. , Houston, Tex. W I L S O N , Prof L. T. U. S. Naval Academy, Annapolis, Md. 312 West St. W I L S O N , Prof. N. R. Univ. of Manitoba, Winnipeg, Canada. W I L S O N , Asst. Prof. R. E. Nor thwes tern Univ., Evanston, 111. W I L S O N , ASSO. Prof. W. A. Yale Univ., New Haven, Conn. 1960 Chapel St. W I L S O N . Asst. Prof. W. H. Sta te Univ. of Iowa, Iowa City, la . 210 Physics

Bldg. WINGER, Asst. Prof. R. M. Univ. of Washington, Seatt le, Wash. WOLFE, Asst. Prof. C. L. E. California Inst , of Technology, Pasadena, Calif. W O L F F , Prof. H. C. Drexel Inst. , Phi ladelphia, Pa. WONG, Dr. B. C. Instr . , Univ. of California, Berkeley, Calif. 1917 Addison St. WOOD, FREDERICK. Instr . , Univ. of Wisconsin, Madison, Wis . 2253 Key es Ave. WOOD, Asst. Prof. F . E. Nor thwes te rn Univ., Evanston, 111. WOOD, Prof. R U T H G. Smith Coll., Nor thampton, Mass. 249 Crescent St. WOODARD, Prof. D. W. Howard Univ., Washington, D. C. 601 Howard PI. WOODS, Prof. B. M. Univ. of California, Berkeley, Calif. WOODS, Prof. F . S. Massachuset ts Inst , of Technology, Cambridge, Mass. WOODS, Dr. ROSOOE. Associate, S ta te Univ. of Iowa, Iowa City, l a .

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WOODWARD, J. H. Actuary. 43 Cedar St., New York, N. Y. •WOODWARD, Dr. R. S. Retired President, Carnegie Institution, Washington,

D. C. WOBTHINGTON, Dr. EupHEMiA R. Instr., Wellesley Coll., Wellesley, Mass. 10

Waoan St WREN, Prof. F. G. Tufts Coll., Tufts College 57, Mass. WRIGHT, Prof. W. L. Lincoln Univ., Lincoln University, Pa.

YANG, Dr. T. S. Care of Guaranty Trust Co., 50 Pall Mall, London, S. W. 1. Eng­land.

YANNEY, Prof. B. F. Coll. of Wooster, Wooster, 0. 5557 University Ave. Chicago, III.

YEATON, Asst. Prof. C. H. Oberlin Coll., Oberlin, 0. I l l Forest St. YEN, Prof. CHIA-CHAO. Tangshan Engineering Coll., Tangshan, North China. YOUNG, Dr. A. E. Standard Oil Company. 545 W. Penn Way, Pittsburgh, Pa. YOUNG, Dr. JESSICA M. Instr., Washington Univ., St. Louis, Mo. YOUNG, Prof. J. W. Dartmouth Coll., Hanover, N. H. YOUNG, ASSO. Prof. J. W. A. Univ. of Chicago, Chicago, 111. 5422 Blackstone

Ave. YOUNG, WILLIAM.. New York Life Insurance Co., 346 Broadway, New York, N. Y. YOWELL, Dr. E. I. Cincinnati Observatory, Cincinnati, 0. Griest and Cor*

bett Aves. ZEHRING, Asso. Prof. W. A. Purdue Univ., Lafayette, Ind. 303 Russell St. ZEISLER, E. B. Associate, Univ. of Chicago, Chicago, 111. Care of Morgan.

Harjes & Co., Paris, France. ZELDEN, Dr. S. D. Instr., Massachusetts Inst, of Technology, Cambridge, Mass. ZERVOS, Prof. PANAIOTIS. Univ. of Athens, Athens, Greece. Rue Sozopoleos 88. ZIWET, Prof. ALEXANDER. Univ. of Michigan. Ann Arbor, Mich. 532 Packard St,

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Number of Members, January 1, 1920 733 Members Admitted, 1920-1922 380 Members Withdrawing, 1920-1922 20 Number of Members, December, 1922 1,093 Number of Life Members, December, 1922 82