SUBJECT INDEXINDUSTRIAL AND ENGINEERING CHEMISTRY

ANALYTICAL EDITION VOLUME 6— 1934

A B S O R B E R S :Gas Absorption Bulb for Use with Small Am ounts of Reagent. J. A .

Shaw ...................................................................................................... 479N ew Absorption Tube. G. E . L eW orth y ................................................... 139Sintered Glass— for Determ ining Carbon b y W et Com bustion.

P . A. W ells, O. E . M ay, and C. E . Sensem an....................................... 369Acetyl, Im proved M ethod for Determ ination of Percentage— in Or­

ganic Com pounds. M ax Phillips................................................................... 321A c i d s :

Com position of Fatty— M ixtures. II . Tw itchell M ixed-M elting- Point M ethod for Determining Individual Saturated F a tty Acids.R . N. W enzel...................................................................................................... 1

Determ ination o f— of Plant Tissue:II. Total Organic— of T ob a cco Leaf. G . W . Pucher, H . B .

V ickery, ana A. J. W akem an................................................................... 140III. Citric. G . W . Pucher, H . B . V ickery, and C. S. Leaven­

worth .............................. 190D ouble— M ethod of Optical Analysis of Beet Products. S. J.

Osborn and J. H. Z iscn ................................................................................... 193Furoic— as Acidimétrie Standard. H . B . K elloç and A. M . K e llo g .. 251Source of Error in A cidim etry. Potentiom etn c T itration in N on-

aqueous Solutions. II . L. A . W ooten and A. E. R u eh le.................. 449Sugar— Pectin Relationships and Their Bearings upon Routine

Evaluation of A pple Pectin. Pectin Studies. II. R . Stucwer,N. M . Beach, and A. G . O lsen..................................................................... 143

(See also kind o f acid.)Aération in K jeldahl Distillations. W . B . M eldrum , R . M elam py, and

W . D . M yers................................................................................................................ 63Aération, Sintered Pyrex Glass Tubes for. R . D . Cool and J. D .

G raham ......................................................................................................................... 479Agitator. C onverted Air-Pum p Shaker. A . A . M orton ......................... 469Agitator. Stirrer for Solvent Extraction. J. A . Patterson,..Jr............... 171Air, Im proved Analyzer for Carbon M onoxide in. H . W . Frevert and

E . H . Francis.......................................................................................................... 226A l c o h o l s :

Analytical Uses o f 2-Propanol. G . W . Fem er and M . G . M e llo n .. 345Constant-Feed Buret and Apparatus for Catalytic D ehydration of.

B. B . C orson .................................................................................................... 297Cyclohexanol in C olorim etric D eterm ination of M olybdenum . L . C .

Hurd and Fred R eynold s.................................................................................. 477Nessler’s Reagent as Test in Rem oval o f Impurities from M ethanol.

A . A . M orton and J. G . M a rk ..................................................................... 151Aldehydes, Estim ation o f— in Rancid Fats. C . II. L ea .......................... 241Aldehydes, Im proved Procedure for Estim ating— by Bisulfite M ethod.

A . E . Parkinson and E, C . W agner................................................................... 433Alkalies, Determ ination o f C om m on and R are— in Mineral Analysis.

R . C . W ells and R . E . S tevens............................................................................ 439Alkaline Solutions, Determ ination o f Sulfide Sulfur in— Containing

Other Sulfur Com pounds. E . L. Baldeschw ieler....................................... 402Alloys, R apid Potentiom etric M ethod for Q uantitative Determ ination

of Copper in. H . B . H ope and M adeline R oes........................................ 316Alpha-Cellulose. See Cellulose.Aluminum Bronze Pow der. See Bronze.Alum inum , M odified H ydrogen Evolution M ethod for M etallic M ag­

nesium, Zinc, and. R . II. K ra y ...................................................................... 250Amines, Identification o f— as 2,4-Dinitrobenzoates. C . A . Buehler

and J. D . C a lfee ................................ 351Am m oniacal Nitrogen^ See N itrogen.A m m onia MicroanalyBis. See M icroanalyses.Anesthesia, Chem ical Exam ination of Trichloroethylene for. II. L.

Tschentk e................................................................................................................. 21Antim onial Tellurium Lead. See Lead.A n t i m o n t :

D eterm ination o f— in Solder. C . L. B arber.............................................. 443E lectrode. See Electrode.Estim ation of Small Am ounts of Bism uth, T in , M olybdenum , and—

in Copper. Bartholow P a rk ........................................................................ 189Volum etric M ethod for Determ ining Small Am ounts o f— in W hite

M etals. C . W . A nderson .............................................................................. 456Apple Pectin. See Pectin.A h s k n i c :

Application of Enclosed T orch to Estim ation of— in Foods. R . E .Rem ington, E . J. Coulson, and H arry von K oln it* ............................ 280

Determ ination o f Selenium and— b y Distillation. W . O. R obinson ,H . C . D udley, K . T . W illiams, and H . G . B y ers ................................. 274

O rganic, N ickel M icrobom b for M icroestim ation of. F . E . Beamishand H . L . C o llin s . ..................................................................................... 379

O xvgen-B om b Com bustion M ethod for Preparation o f Samples for D eterm ination oL F . P. Carey, G . B lodgett, and H . S. Satterlee. 327

Precipitation of Barium in C opper-T in G roup of Qualitative Analy­sis. W . T . Hall and R . B . \Yoodw ard..................................................... 478

R apid M ethod for Determining Small Am ounts of. C . E . Lachele. 256Separation, D etection , and Estim ation o f G old , Platinum, Pal­

ladium , Selenium, Tellurium, Iodine, and. Reducing A ction ofM ercurous Chloride. G . G . P ierson ......................................................... 437

Asbestoe in Permanganate Titrations. R . W . Curtis and J. Finkel-stein. (C orrection )............................................................................................... 18

Autoclave, Constant-Tem perature H igh-Pressure— for the Labora­tory . F . J. D ykstra and George Calingaert.............................................. 383

B A R IU M , D etection of Calcium in Presence o f Strontium and.E . R . C a ley ................................................................................ ...........................

B ariura.Precip itation o f— in C opper-T in G roup of Qualitative A naly­sis. W . T . Hall and R . B . W oodw ard ...........................................................

B eet Products. See Sugar. #Benzene, M odification of A . S. T . M . L am p for D eterm ination of Sul­

fur in Gasoline or. H . O. E rv in ............................................... .......................Bism uth, Estim ation of Small A m ounts o f A n tim ony, T in , M o ly b ­

denum, and— in Copper. B artholow P a r k .. ; ...........................................Bisulfite M ethod, Im proved Procedure for Estim ating A ldehydes by.

A . E . Parkinson and E. C . W agner................................ ................................B lood , Determ ination of Iron in— and M ilk b y A daptation o f M er-

cajjtoacetic A cid Colorim etric M ethod . G ladys Leavell and N . R .

Boiler W ater. See W ater. < # tBoiling Point, Apparatus for M easuring Boiling R ange and. D .

Suiggle, C. O. Tongberg, and M . R . F en sk e..t............................................ing Point, M icro-, Apparatus for M elting Point and. W . L . W alsh

B om b, M icro-. See M icroanalyses.B om b, O xygen— Com bustion. See C om bustion Analyses.B orate Ion , D eterm ination o f— in Ores of B orax. H . L . P a y n e ............Borax. See preceding item. t , #B oric Acid, Stability of A queous Solutions o f— Used in K jeldahl

M ethod. Abner Eisner and E. C . W agn er.................................................B r o m i n e : .

D eterm ination o f B rom ide in Presence of Large Excess of Chloride.R . F. N ew ton and E. R . N ew ton ................................................................

Q uantitative Estim ation of Furfural at 0 ° C . w ith. E . E . H ughesand S. F . A cree ................................................... .............................................. ..

Volum etric Estim ation o f 5 -B rom o-2-F uroic A cid w ith StandardBrom ate. E . E . H ughes and S. F . A cree ................................................

5 -B rom o-2-F uroic A cid . See preceding item.Bronze Pow der, Alum inum , C overing C apacity (on W ater) of. J. D .

Edwards and R . B . M a son ...................................................................... ...........Buret, C onstant-F eed— and A pparatus for C ata lytic D ehydration of

Alcohols. B . B . C orson ..................................... -Buret, M icro-. G . W . Standen and M . L . F u ller ........................................Butadiene, D eterm ination o f— in Gases. H ans T ropsch and W . J.

M a tto x .......................................................... ...............................................................Butene. 6’ «« H ydrocarbons.Butter Fat. See Fats.

C A B L E Insulation. See Paper.Calcium , D etection of— in Presence o f Strontium and B arium . E . R .

C a ley ........................................................................................................................... ..Calorim eter, O xygen. Stainless Steel B om b in. F. F . F landers............Calorim etry, H eat-of-Solution M eth od in— of Portland Cem ent. R .

W . Stenzel and S. B . M orris .................................................................Cam phor, Estim ation of M ethyl Salicylate, M enthol, and— in M ix­

tures. H ; J. H osking, F . D . Snell, and F . M . B iffen .............................Capillary Penetration of Fibrous M aterials. R . L . Peek, Jr., and D .

A. M cL ean ..................................................................................................................C a r b o n : . . .

Determ ination o f T ota l— in Soils b y W et O xidation M ethod . J . E .A dam s......................................................................................................................

M icrodeterm ination. See M icroanalyses.Sintered Glass A bsorber for D eterm ining— b y W et C om bustion .

P . A . W ells, O. E . M ay, and C . E . Sensem an........................................C a r b o n D i o x i d e : _

Continuous D eterm ination and R ecording o f— C on ten t o f H elium -Bearing Gas M ixtures. A . S. S m ith .........................................................

C ontinuous D eterm ination o f Carbonate-C austio R a tio in— A b ­sorption System . A . S. Sm ith ....................... ..............................................

Solid— in D eterm ination of T in . H . I. W h ite ........................................Carbon M onoxide Im proved Analyzer for— in Air. H . W . Frevert

and E . H . F rancis......................................... ..........................................................C arbon M onoxide M icroanalysis. See M icroanalyses.C arbon Tetrachloride, Flam e D eterm ination of C opper b y . Peter

G abriel..........................................................................................................................Carbonyl C om pounds, D eterm ination o f— b y 2 ,4-D initrophenylhydra-

zine. H . A . Iddles and C . E . Jackson ....................................... .••••.-------Carotene, D eterm ination o f— as M eans of Estim ating V itam in A

Value of Forage. H . R . G u ilb er t ......................................... .........................Casein, Purification o f— b y Electrodialysis. A . L . Elder, R . P . Easton,

H . E . Pletcher, and F . C . P eterson .................................................................Cassava Flour. See Starch.C a t a l y s t s :

Choice o f— for H ydrogen Electrode. A . E . L orch ..................................C onstant-Feed Buret and Apparatus for C ata lytic D ehydration of

Alcohols. B . B . C orson .................................................................... .............Platinized Silica G el as— in G as Analysis. I I . O xidation of

M ethane H ydrocarbons. K . A . K obe and E. B . B rookbank.........Caustic, Self-Filling P ipet for Dispensing H ot— Solutions. C . J. B .

T h o r .......................................................................................Cellulose, A lpha-, D eterm ination of. C . K . B u m p ..................................Cem ent, Portland, H eat-of-Solu tion M ethod in Calorim etry o f. R . W .

Stenzel and S. B . M orris ............................................................. . ......................Centrifugal Estim ation, R apid— of Small A m ounts o f Sodium . E . R .

Caley, C . T . B row n, and H . P . P rice .............................................................

484

478

225

189

433

46

466468

45

473

213

123

292

159

297299

104

445

445258

246

254

85

277

369

293

217234

226

420

454

452

65

164

297

35

326223

246

202

November 15, 1934 I N D U S T R I A L A N D E N G I N E E R I N G C H E M I S T R Y 485

C en c Sulfate, Analysis of M ixtures o f O xalic and C itric Acids by Titration with. J. A . W ilkinson, I. R . Sipherd, E . I. Fulmer, andL. M . C hristensen................................................................................................... 161

Ceric Sulfate for E stim ating T in in Bearing M etals. L. G . Bassettand L. F . S tu m p f.................................................................................................... 477

Cesium, Analytical Reactions o f R ubidium and. W . J. O 'Leary andJacob P apish ............................................................................................................. 107

Charts. D eterm ination o f T ie Lines in Ternary Systems. T . W .E van s............................................................................................................................ 408

C h l o r i n e :Chlorinated H ydrocarbons. See H ydrocarbons.D eterm ination of Brom ide in Presence of Large Excess of Chloride.

R . F . N ew ton and E. R . N ew ton ................................................................ 213Electrom etric D eterm ination of Chlorides in Ash and Sap of Plants

and in G round W aters. J. R . N eller....................................................... 426Chrom ium in Steel. See Steel.Cigarets, F ire-Ilazard Tests w ith ........................................................................ 90C i t r i c A c i d :

Analysis of M ixtures o f O xalic and— b y Titration with Ceric Sulfate.J. A . W ilkinson, I. R . Sipherd, E . 1. Fulmer, and L. M . Christen­sen ............................................................................................................................. 101

D eterm ination o f Acids o f Plant Tissue. II I . G . W . Pucher, H. B.V ickery, and C. S. Leavenw orth ................................................................. 190

D eterm ination of Citrate. W . F . B ru ce ..................................................... 283Simultaneous Determ ination of M alic and— in Plant Tissue. G . W .

Pucher, H . B . Vickery, and A. J. W akem an .......................................... 288C lover, Sweet, Q uantitative D eterm ination of Coumarin in. I . J.

Duncan and It. B . D ustm an .............................................................................. 210Coal, Significance of Solvent Extraction and Rational Analysis in—

Carbonization. E . B . Kester, E . J. Schneider, and F . W . J u n g .. . . 98Coal Tar. See Tar.Cobalt, V olum etric M ethod for Determ ining N ickel and. J. T . D o b ­

bins and J. P . Sanders.......................................................................................... 459C oconut Oil. See Oil.C olor Charts, Industrial Uses o f ........................................................................... 103C o l o r i m e t r i c D e t e r m i n a t i o n s : #

A pplication of Photronic Colorim eter to Determ ination of Fluoride.L V. W ilcox ......................................................................................................... 167

Cyclobexanol in— of M olybdenum . L. C . Hurd and Fred Reynolds 477D eterm ination of Iron in B lood and M ilk by A daptation of M er-

captoacetic A cid C olorim etric M ethod . G ladys Leavell and N.R . E llis .................................................................................................................... 46

Fluorine. O. M . Smith and H . A. D u tch er................................................ 61Iodine by Starch-Iodine Reaction. H . Q. W o o d a rd . ................... 331Optical D ensity Color Measurements for Petroleum Oils. S. W .

Ferris and J. M . M c llv a in ............................................................................. 23Silica. H . W . Swank and M . G. M ellon ..................................................... 348Silica in Boiler W ater. M . C. Schw artz..................................................... 364

Colum bium in Steel. See Steel.C o m b o b t i o n A n a l y s e s :

D eterm ination of Iodine in Plant M aterial. J. S. M cH argue, D . W ,Young, and R . K . C alfee. ........................................ 318

O xygen-B om b Com bustion M ethod for Preparation of Samples for D eterm ination of Arsenic. F . P . Carey, G . B lodgett, and H . 8 .Sattcrlee................................................................... _............................................. 327

W et, Sintered Glass A bsorber for Determ ining Carbon by . P . A .W ells, O. E . M ay , and C. E . Scnscm an................................................... 369

C o p p e r : . .Com parative Clarification o f Sugar Solutions by— R eduction and

Iodine Titration M ethods. L. G . Say well and E. P. P h illip s .. . . 116Estim ation of Small A m ounts of Bism uth, A ntim ony, T in , and

M olybdenum in. Bartholow P ark ....................... 189Flam e Determ ination o f— by C arbon Tetrachloride. Peter Gabriel. 420R apid Potentiom etric M ethod for Q uantitative D eterm ination o f—

in Alloys. H. B. H ope and M adeline R oss ............................................ 316Solution o f D ifficultly Soluble— Ores. T . H. W h iteh ea d .................... 298

C opper N itrate, Determ ination of Base Exchange in Soils with. E . A .Fieger, J . G ray, and J. F. R e e d ........................................................................ 281

C o t t o n s e e d : ,D eterm ination of Pentosans in— n u lls Containing Tannins. A . P.

Sakostschikoff, W . T . Iw anow a, and A. M . K urennow a................... 205Estim ation o f Total and Bound (D ) G ossypol in— M eal. F . H .

Smith and J, O. Halverson. (C orrection )............................... 22E xtraction of G ossypol from — M eal. J. 0 . Halverson and F. H .

Sm ith ........................................... ; .................v.......... ;* : * * V* VCoum arin, Q uantitative D eterm ination of— in Plant M aterial. I. J.

D uncan and R . B . D ustm an .............................................................................. 210C ryolite , S ynthetic— Analysis. F . J. F rere .................................................... 124C yclohexanol. See A lcohols.

D E V A R D A M ethod . See Nitrates.D extrose. See Sugar. , tD ichrom ate, O xidation-R eduction Indicators for Use with. L . E .

Straka with R . E . O esper.................................................................................... 465D ichrom ate. Retention o f— b y Glassware. E . P . L a n g . . . . . . ................ I l lD ielectric Constants, D eterm ination o f— by R adio. M . M . O tto and

H . H . W en zk e......................... : ................. • * 1872.4-D initrobenzoates, Identification o f Amines as. C . A . Buehler and

J. D . C a lfee ............................................... . - ; ............. .............. .. • .............. y 3512.4-D initrophenylhydrazine, D eterm ination o f Carbonyl Com pounds

b y . H . A . lad les and C . E . Jackson ............................................................ 454D i s t i l l a t i o n :

Apparatus for— of Phenols from W ater. E . A . M eanes and E . L.N ew m an..................................................... - .................... 375

Differential Pressure C ontrol M echanism for— under Vacuum . S.Palkin and O. A . N e lso n . ....................................... 386

Inverted Fractional— Analysis. R . A . J. Bosschart...••••*•• 29K jeldahl, Aeration in. W . B . M eldrum , R . M elam py, and W . D .

M yers............................................................................ .......................................... 6 «N ew — Trap. O. S. Rask, E . K aplan, and H . C . W aterm an ......... 299Preventing Bum ping in— under Vacuum . A. A . M o rto n .......... 384Sim ple B atch , Analysis of D ry Refinery Gases below Pentane by .

J. llap pel and D . W . R ob ertson • •» 323Simple Laboratory Apparatus for— under Vacuum . A . W . Stout

and H . A . Sch u ette .......................................................... ................. ............. .. <76Stillhead for R apid Concentration in V acuo. H . B . V ickery and

G . W . P u ch er........................................................................................... 372D otreppe’s M ethod . See Tungsten.

E G G S , D eterioration o f— in Storage........................................... ................... 255Eggs, Precise M ethod for D eterm ining Am m oniacal N itrogen in.

A . W . T h om as and M . A . Van H auw aert............................... .................... 338

E l e c t r o d e s :Glass and Other— for Measuring pH Values o f D ilute Buffers and

Distilled W ater. J. O. Burton, H arry M atheson, and S. F . Acree. 79H ydrogen , Choice of Catalysts for. A . E . L orch ................................. 164N ew T yp e of Antim ony—-for pH M easurements. T , R . Ball, W . B .

Schm idt, and K . S. Bergstresser. (C orrection , 9 7 ) .............................. 60Electrodialysis, Purification o f Substances by . A . L. Elder, R . P.

Easton, H . E . Pletcher, and F . C . Peterson ................................................ 65Electrom etric Determ ination o f Chlorides in Ash and Sap of Plants

and in G round W aters. J. R . N eller............................................................ 426Electrom etric Measurements, Salt Bridge for. G. W . Irving, Jr., and

N . R. Sm ith ................................................................................................ 480Ether, Effect of M oisture and Repeated E xtraction w ith— b y D if­

ferent Procedures upon E xtraction of G ossypol from C ottonseedM eal. J. O. H alverson and F . H . Sm ith ..................................................... 356

Ethylene. See H ydrocarbons.E vaporation Rate M ethod Applied to Petroleum Thinners. D . D .

Rubek and G . W . D ahl......................................................................................... 421Extraction Formulas, Com parison of. C . W . G riffin ................................. 40Extraction, Stirrer for— b y M eans o f Solvents. J. A . Patterson, J r . . . 171E x t r a c t o r s :

Autom atic All-Glass— for the Laboratory . W . A. L a Lande, Jr.,. and E. C . W agner............................................................................................... 300

Im proved— for Fat. A . D . H olm es and M . G. P ig o tt ............................ 384Large-Size M odified Soxhlet for H ot Extractions. L . S. G rant, Jr.,

and W . M . B illing............................................................................................... 285

F A T S :E xtractor for. See Extractors.M odified Kirschner Procedure for D eterm ination o f B u tter— in

Presence of C oconu t Oil. F . F. Flanders and A . D . T ru it t 286Rancid, Estim ation of Aldehydes in . C . II. L e a ................................ 241

F a tty Acids. See Acids.Fertilizers, D eterm ination of Potash in . F . B . Carpenter and R . O.

Pow ell........................................................................................................................... 62Fertilizers. M odified D evarda M ethod for D eterm ination of N itrates.

Jehiel D avidson and Alexander K rasn itz...................................................... 315Fibrous M aterials, Capillary Penetration of. R . L . Peek, Jr., and

D . A. M cL ea n ........................................................................................................... 85F i l t r a t i o n :

Filtering Fruit Juices and Plant Extracts. J. A . H all and W . E.B a ier ......................................................................................................................... 208

Preparation of Sintered Pyrex Glass Filters. P . L. K irk, R oderick Craig, and R . S. Rosenfels. (C orrespondence; Jena GlassW orks, Schott & G en.. 2 9 1 ).......................................................................... 154

Rubber Stopper Rem olding for— under R educed Pressure. G . F.Smith and J. L. G rin g....................................................................................... 385

Suction D evice. Louis C oh en .......................................................................... 322Fire Extinguishers. See Phosgene.Fire-H azard Tests with C igarets........................................................................... 90Flam e D eterm ination of Copper. See Copper.Flam e Tests. Cleaning Platinum W ire for. W . G. L eigh ton ................. 84Flour. See Starch.F l u o r i n e :

Application of P h otronic Colorim eter to D eterm ination o f Fluoride.L. V. W ilcox ............................................ 167

Colorim etric Determ ination of. O. M . Smith and H. A . D u tch e r .. 61Determ ination o f Fluorides in Natural W aters. J. M . San ch is 134Spectral Determ ination o f— in W ater. A . W . P e t r e y . .......................... 343Zirconium Purpurin T est in D etection and Estim ation of Small

Am ounts of. I . M . K olthoff and M . E. S tan sby .............................. 118F ood , Application of Enclosed T orch to Estim ation of Arsenic in.

R . E . Rem ingtonj E . J. Coulsonj and H arry von K oln ita ..................... 280Forage, Vitamin A in. See Vitamins.Fractional D istillation. ¿See D istillation.Fructose. See Sugar.Fruit, D eterm ination of Peroxidase A ctiv ity in Vegetables and. D . A .

P a ck .............................................................................................................................. 170Fruit Juices, Filtering Plant Extracts and. J. A . Hall and W . E . Baier. 208 Furfural, Q uantitative Estim ation o f— at 0 ° C . w ith Brom ine. E . E .

Hughes and S. F . A cree ........................................................................................ 123Furoic Acid as Acidim etric Standard. H . B . K ellog and A . M .

K ellog ........................................................................................................................... 251

G A S E S :Absorption Bulb for— for U bb with Small A m ounts o f Reagent.

J. A . S haw .............................................................................................................. 479Analysis o f D ry Refinery— below Pentane b y Sim ple B atch Dis­

tillation. J. H appel and D . W . R ob ertson ............................................... 323C onstant-H ead— Scrubber for Small Pressure D rops. A . 8 . Sm ith 279 D eterm ination o f Butadiene in. Hans Tropsch and W . J. M a t t o x . . 104Easily M ade B ottle for— W ashing. A . H . M cK in n ey .......................... 258Gaseous H ydrocarbons. 5 «« H ydrocarbons.H elium -Bearing:

Continuous Determ ination and R ecording o f C arbon D ioxideC ontent of— M ixtures. A . S. S m ith ..................................... 293

Continuous Determ ination o f Carbonate-C austic R atio in C arbonD ioxide Absorption System. A . 8. Sm ith .............................................. 217

Im proved Apparatus for Q uantitative Estim ation of Helium in Gases. F . E. E. G erm ann, K . A . G agos, and C . A . N e ilso n .. . . 215

Microanalysia of Gaseous M ixtures by Preasure-TemperatureCurves. J. J. S. Sebastian and H . C . H ow a rd ................................... 172

M icroanalysis of. I I I . H ydrogen, C arbon M onoxide, H ydrogen Chloride, and Am m onia. F. E . B lacet and G . D . M a c D o n a ld .. . 334

N atural, M ethod for M easuring D ew Point of. A . M ichels andG . W . N ederbragt........................................................................................... 165

Platinized Silica Gel as C atalyst in— Analysis. II . O xidation ofM ethane H ydrocarbons. K . A . K obe and E. B . B rookbank 35

U nitized— Analysis Apparatus. M . P. M a tu szak . ........................ 72Gasoline, D eterm ination o f— C ontent o f Gases. Analysis o f Gaseous

H ydrocarbons. Hans T ropsch and W . J. M a tto x ................................... 405Gasoline, M odification of A . S. T . M . Lam p for D eterm ination of Sul­

fur in Benzene or. H . O . E rv in ................... 225G l a s s :

Electrode. See E lectrode.E xtractors. See Extractors.Plate, Flexible Form o f . ................................................................................... 153Preparation o f M icroscopic— Spheres. Samuel Sklarew ....................... 152Pyrex— Filters. See Filtration.Retention o f D ichrom ate by . E . P . L au g .................................................. I l l

486

Sintered— Absorber. Sec AbaorLer.Glucose. See Sugar. _G lycosides, Com m on, Identification of. K. E . Jackson and W . M .

D eh n ............................................................................... : . 382G old, Separation, D etection, and Estim ation of Arsenic, Platinum,

Palladium, Selenium, Tellurium, Iodine, and. Reducing Actionof M ercurous Chloride. G. G. Pierson.................................................. 437

G old, Separation o f— from Tellurium. V ictor Lenher, G . B. L. Smith,and D . C. Knowles, Jr................................................ ....................................... 43

G ossypol, Estim ation of T ota l and Bound (D )— in Cottonseed Meal.F. II. Smith and J. O. Halverson. (C orrection )........................................ 22

G ossypol, Extraction o f— from Cottonseed Meal. J. 0 . Halverson andF. H. Sm ith..................................... 356

Grape Juice, Purification o f— by Electrodialysis. A . L . Elder, R . P.Easton, H. E . Pletcher, and F . C . Peterson........................................... 65

Graphite Greases. See Petroleum Lubricants.Greases. See Petroleum Lubricants.G utta-Percha, Iodine Value of R ubber and— H ydrocarbons as D eter­

mined by Iodine Chloride. A . R . K em p and G. S. M ueller.............. 52

H A L O G E N S , Organic, D eterm ination of. F. E . B eam ish..................... 352H elium-Bearing Gases. See Gases.H ot-P late, M icro-, for Protein H ydrolysis. A . R . P a tton ....................... 201H y d r o c a r b o n s :

E ffect o f Fire-Extinguisher Chlorinated— on Determination ofPhosgene b y Soda M ethod. M . P. M atuszak..................................... 374

Gaseous, Analysis of. Hans Tropsch and W . J. M attox :D eterm ination of Gasoline Content of G ases........................................ 405M ethod for Determ ining Ethylene, Propene, and B u ten e............... 404M ethod for D eterm ining Gaseous Paraffins and Olefins................... 235

M ethod for Measuring Dew Point of Natural Gases. A . Michelsand G. W . N ederbragt........................................ 165

Short-Cut M ethod o f— Analysis. II. Application to Analysis ofStabilizer Bottom s. R . Rosen and A. E . R obertson ........................ 12

Specific R efractive Dispersion as a M ethod for Distinguishing be­tween Different Scries of. A . L. W ard and W . H. Fulw eiler 396

{See also kind o f hydrocarbon.)H y d r o g e n :

Electrode. See Electrodes.M icrodeterm ination. See M icroanalyses.M odified— E volution M ethod for M etallic M agnesium, Aluminum,

and Zinc. It. H . K ra y ................................................................................... 250N ew Absorption Tube for— Determination. G. E . L eW orth y 139

H ydrogen Chloride M icroanalyeis. See M icroanalyses.H y d r o g k n - I o n D e t e r m i n a t i o n s :

Glass and Other Electrodes for Measuring pH Values o f D ilute Buffers and Distilled W ater. J. O. Burton, H arry M atheson, andS. F . A cree ........................................................................................................... 79

New T yp e of Antim ony E lectrode for pH Measurement. T . R.Ball, YV. B . Schm idt, and K. S. Bergstresscr. (Correction, 9 7 ) . . 60

Salt Bridge for Electrom etric Measurements in. G. W . Irving, Jr., and N. R . S m ith ................................................................................................ 480

IC E , Artificial, G erm any D evelops Im proved Process of Steriliz in g.. . 59Indiana O xidation Test. See Petroleum Lubricants.Indicators, O xidation-R eduction— for Use with Dichrom ate. L. E .

Straka with R. E . Oesper................................................................................... 465Insecticides. Determ ination of Naphthalene in Poultry Lice Powders.

D . S. Binnington and W . F. G eddes.............................................................. 461Invert Sugar. See Sugar.I o d i n e :

Colorim etric D eterm ination of— by Starch— Reaction. H . Q.W oodard ................................................................................................................ 331

Com bustion M ethod for Determ ination o f— in Plant M aterial.J. S. M cIIargue, D . YV. Young, and R. K . C a lfee.............................. 318

Com parative Clarification of Sugar Solutions b y Copper Reduction and—-Titration M ethods. L. G . Saywell and E. r . P h il l ip s . . . . 116

Separation, D etection , and Estim ation of Arsenic, G old , Platinum, Palladium, Selenium, Tellurium, and. Reducing Action ofM ercurous Chloride. G. G. Pierson........................................................ 437

Value of R ubber and G utta-Percha H ydrocarbons as Determ inedby— Chloride. A . R . Kemp and G. S. M ueller ................................ 52

Volatilization o f— from D ilute— Potassium Iodide Solutions. YV. A.H ough and J. B . F ick len ................................................................................ 460

Iodine Pentafluoride, Form ation o f .................................................................... 267Iodom etric Determ ination of Phosgene. M . P. M atiiszuk..................... 457Iridium as Catalyst for H ydrogen Electrode. A . E. L orch ..................... 164Iron, D eterm ination o f— in M ilk and B lood b y Adaptation of M er-

captoacetic Acid Colorimetric M ethod. Gladys Leavell and N. R.E llis.............................................................................................................................. 46

K IR S C H N E R Procedure. See Fata.K j e l d a h l M e t h o d :

Aëration in— Distillation. W . B . M eldrum, R . M elam py, and W . D

Micro^, D ilution M ethod for Determinations by . O live H a r tle y .. . 249Stability of Aqueous Solutions of Boric A cid Used in. Abner

Eisner and E. C . W agner............................................................................... 473

L A C Q U E R S , D etection and Determ ination of Solvents and VolatileLiquids in N itrocellulose— and— Thinners. C . E . W a tts 262

{See also Paints.)Lam p M ethod for Sulfur Titrations. See Titration.L e a d :

D eterm ination o f— as D ilead H ydrogen Arsenate. C . L . D unnand H. V. T a rta r ............................................................................................... 64

D eterm ination o f Tellurium in Tellurium Lead and in Tellurium An­tim onial Lead. YV. J. B row n ......................................................................... 428

Q uantitative Estim ation of— as Periodate. H. H . W illard and J. J.T h om p son ................................................................................................................ 425

Soap. See Soap.Volum etric M ethod for Determ ining Small Quantities of Antim ony

in. C . W . A n d erson . ....................................................................................... 456Levuloae. See Sugar. ,Liquids. Determ ination of T ie Lines in Ternary Systems. T . W .

E v an s......................................................................... 408

M A C K E Y Oil Tester. See OU.M agnesium , M odified H ydrogen E volution M ethod for M etallic

Alum inum , Zinc, and. R . H. K ra y .............................................. 250M alic Acid, Simultaneous D eterm ination o f C itric and— in Plant

Tissue. G . YV. Pucher, H . B . V ickery, and A. J. YVakeman 288M elting Point, Apparatus for— and M icroboiling Point. YV. L. YValsh. 468 M elting Point Apparatus w’ith R apid M echanical Stirring. K . S.

M arid ey ................................................................................................ 475M enthol, Estim ation of M ethyl Salicylate, C am phor, and— in M ix­

tures. H . J. H osking, F. D . Snell, and F. M . B if fe n . ........................... 254M ercaptoacetic Acid Colorim etric M ethod. D eterm ination o f Iron in

M ilk and B lood b y A daptation of. G ladys Leavell and N . R . Ellis 46 M ercurous Chloride, Reducing A ction of. Separation, D etection , and

Estim ation of Arsenic, GolcL Platinum , Palladium , Selenium,Tellurium, and Iodine. G. G . P ierson ............................................................. 437

M e t a l s :Bearing, Ceric Sulfate for Estim ating T in in. L . G . Bassett and

L. F. Stum pf ..................................................................... 477Inclusion of Rarer— in Elem entary Q ualitative Analysis. L. E .

Porter:I. Tungsten and M olybdenum in G roups I and I I ........................... 138II. Titanium and Vanadium in G roup I I I ......................................... 448

W hite, Volum etric M ethod for Determ ining Small Quantities ofAntim ony in. C . YYr. A nderson ...................................................................... 456

(1See also kind o f metal.)M ethane, Oxidation o f— H ydrocarbons. Platinized Silica G el as

Catalyst in Gas Analysis. I I . K . A . K obe and E. B . B ro o k b a n k .. 35M ethanol. See Alcohols. ,M ethyl Salicylate, Estim ation of M enthol, C am phor, and— in M ix­

tures. H. J. H osking, F. D . Snell, and F . M . B iffen ................................... 254Meulen, ter, M ethod of. See Organic C om pounds.

Carbon and H ydrogen. J. B . Niederl and R . T . R o th ............................ 272D eterm ination of Zinc. P. L . H ib b a rd t. 423D irect Simultaneous— of C arbon, H ydrogem and O xygen in Organic

Substances. I. Analysis of Pure Com pounds Containing Carbon, H ydrogen, and O xygen w ith and w ithout Halogens.W . R . fu rn er ........................................................................................................... 358

Gaseous M ixtures by Pressure-Tem perature Curves. J. J. S. Sebas­tian and H . C . H ow ard .......................................................................................• 172

Gases. II I . H ydrogen, C arbon M onoxide, H ydrogen Chloride,and Am m onia. F. E . B lacet and G . D . M a cD o n a ld .............. 334

Nickel M icrobom b for— of Organic Arsenic. F . E . Beamish andH . L. C ollins................................................................... 379

M icroboiling Point. See B oiling Point.M icroburet. See Buret.M icro H ot-P late. See H ot-Plate.M icro-K jeldahl D eterm ination. See Ivjeldahl M ethod .M icroscope C old Stage with Tem perature Control. C . YV. M ason

and T . G . R och ow ..................................................................................................... 367M icroscope, New U ltraviolet— Illum inator for Use with R ayons. T .

H . D augherty and E. V . H jo r t ...................................................................... 370M ilk, D eterm ination of Iron in— and B lood b y Adaptation o f M er­

captoacetic A cid Colorim etric M ethod . G ladys Leavell and N . R.E llis................. 46

M ineral Analysis, D eterm ination of Com m on and R are Alkalies in.R . C. YVells and R . E . S tevens.......................................................................... 439

M o l y b d e n u m :Cyelohexanol in C olorim etric D eterm ination of. L. C . H urd and

Fred R eyn old s....................................................................................................... 477Estim ation o f Small Am ounts o f Bism uth, A n tim on y, T in , and— in

Copper. Bartholow P a rk ............................................................................ 189Tungsten and— in G roups I and II . Inclusion of Rarer M etals in

Elem entary Q ualitative Analysis. I. L. E . P orter ............................... 138

Vol. 6, No. 6

tyA P H T H A L E N E , D eterm ination of— In P ou ltry Lice Powders.D . S. B innington and YV. F . G ed d es ........................................................... 461

Nessler’s Reagent as Test in R em oval of Im purities from M ethanol.A . A . M orton and J. G . M a rk ........................................................................... 151

N i c k e l :Chrom ium — Steel. See Steel.M icrobom b of. See M icroanalyses.Volum etric M ethod for D eterm ining C obalt and. J. T . D obbins

and J. P. Sanders................................................................................................ 459Nitrates, D eterm ination o f— b y M odified D evarda M ethod . Jehiel

D avidson and Alexander K rasn itz......................................-••*..................... 315N itrobenzene, D eterm ination of Small Quantities o f— in Oils. C . E .

Anding, Jr., B . Zieber, and YV. M . M alisoff................................................ 41N itrocellulose Lacquers. See Lacquers.N itrogen, Organic. See Organic Com pounds.Nitrogen, Precise M ethod for Determ ining Am m onincal— in Eggs.

A. YV. Thom as and M . A. Van Ila u w a ert.................................................... 338

O IL S :C oconu t, M odified Kirschner Procedure for D eterm ination of

Butter Fat in Presence of. F. F. Flanders and A. D . T r u it t . . . . 286M ackey Tester for. P . II. Gill and A. H . G ill...................................... 271R em oval of— Samples from — Im pregnated Paper. J. D . P ip e r . . . . 380Suifonated, D eterm ination o f Inorganic Salts in. Ralph H art. . . . 220

Optical Analysis, D ouble-A cid M ethod o f— of B eet Products. S. J.Osborn ana J. H . Z isch ....................................................................................... 193

O r g a n i c C o m p o u n d s :Determ ination o f Organic H alogens. F . E . B eam ish ........................ 352Im proved M ethod for D eterm ination o f Percentage A cetyl in. M ax

Phillips................................................................................................................... 321M ethod of ter M eulen for D irect Determ ination o f O xygen in—

Containing N itrogen. YV. YV. Russell and M . E. M arks............. 381M icroanalysis. See M icroanalyses.O rganic Acids. See Acids.Q ualitative M ethod for Selenium in. M . J. H o rn ............................... 34Sulfur Determ ination in Sulfite YVaste L iquor and— b y Potassium

Permanganate M ethod. R . N. P ollock and A. M . Partansky. . . . 330Oxalic Acid, Analysis o f M ixtures o f C itric and— b y Titration with

Ceric Sulfate. J. A . YVilkinson, I. R . Sipherd, E. I. Fulm er, andL. M . Christensen................................................................................................. 161

O xidation-Reduction Indicators. See Indicators.Oxygen B om b Calorimeter. See Calorimeter.O xygen M icrodeterm ination. See M icroanalyses.O xygen, Organic. See Organic Com pounds.

A N A L Y T I C A L e d i t i o n

November 15, 1934 I N D U S T R I A L A N D E N G I N E E R I N G C H E M I S T R Y 487

P A IN T : .Apparatus for M easuring Adhesion of D ried Films. R . P . Courtney

and H. F. W akefield . 470Com parison of W et- and D ry-F ilm H iding-Pow er Tests. It. II.

Saw yer............................................................................................... 113C overing C apacity (on W ater) of Alum inum Bronze Pow der. J. D.

Edwards and R . B . M ason ............................................................................ 159Physical Evaluation o f Finishes. A . E . Schuh and II. C . T h eu erer.. 91Practical M ethod for D eterm ining H iding Pow er of. A . E . Jacobsen

and C. E . R ey n old s.................•......................................................................... 393Study of C olor and Brightness of W hite Films of— by the Tonometer.

L. A . W etlau fer................................................................................................... 376(See also Lacquer and Shellac.)

Palladium as C atalyst for H ydrogen Electrode. A . E . L orch 164Palladium , Separation, D etection , and Estim ation o f Arsenic, Gold.

Platinum , Selenium, Tellurium , Iodine, and. Reducing A ction ofM ercurous Chloride. G . G . P ierson ...................................................................437

P a p e r :Conditions to Preserve Pu blication s............................................................... 78Precise M easurem ent of Air Perm eability o f .............................................. 363R em oval o f Oil Samples from O il-Im pregnated— Used as Cable In­

sulation. J. D . P iper...................................................................................... 380Pectin-Su^ar-Acid Relationships and Their Bearings upon Routine

Evaluation of A pple Pectin. Pectin Studies. II. R . Stuewer, N.M . Beach, and A. G . O lsen................................................................................ 143

Pentosans, D eterm ination of— in Vegetable M aterials Containing Tannins. A . P . Sakostschikoff, W . T . Iwanowa, and A. M . K uren-n ow a ................................................................................................................................ 205

Perchloric A cid , Mixed^ Sulfuric and:I. Simultaneous Oxidizing and Reducing Properties of H ot C on­

centrated Perchloric Acid . G . F. Sm ith ................................................. 229II . Potnssium Ferro- and Ferricyanides as Reference Standards in

Evaluation of T itanous Solutions. G . F. Smith and C. A . G e tz . . 252Permanganate. See Potassium Permanganate.Peroxidase A ctiv ity , Determ ination of— in Stored Fruits and Vege­

tables. D . A . P a ck .................................................................................................. 170P e t r o l e u m :

Continuous Laboratory T oppin g Apparatus. II. T . Rail and H . M .S m ith ....................................................................................................................... 373

Lubricants:Determ ination of Lead Soap in Oils and Greases. H arry L e v in . . 333D eterm ination of.Small Quantities of Nitrobenzeno in Oils. C . E .

Anding, Jr., B . Zieber, and W . M . MalisofF.......................................... 41Indiana O xidation Test lo r M otor Oils. T . H . Rogers and B. H.

Shoem aker........................................................................................................ 419M ethod for Evaluating Viscosity-Tem perature Characteristics of

Oils. W . B . M cC luer and M . R. F enske............................................ 389M ethods for C ontrol o f Lubricating Greases. C . L . K n o p f 126Optical D ensity Color Measurements for Petroleum Oils. S. W .

Ferris and J. M . M c llv a in . . . . 23Trichlorobenzene in Analysis of G raphite Greases. F . M . BitTen 169

Thinners, E vaporation R ate M ethod Applied to. D . D . R ubeka n d G . W . D a h l.................................................................................................. 421

Viscosity o f— Products. E . A . W illihnganz, W . B. M cCluer, M . R .Fenske, and R . V. M cG rew ........................................................................... 231

o-Phenanthroline Ferrous Com plex, D irect D eterm ination o f Chro­m ium and Vanadium in Steel Using— as Indicator. H . H . W illardand Philena Y ou n g ................................................................................................ 48

Phenols, Distillation Apparatus for— in W ater. E . A . M eancs andE. L . N ew m an..................................................................................................... 375

Phenols. Examination o f— of a Low-Teinperature Coal Tar. S. C ap-lan, J. Ross, M . G . Sevag, and T . M . Sw itz............................................... 7

Phosgene, E ffect o f Fire-Extinguisher Chlorinated H ydrocarbons onD eterm ination o f— b y Soda M ethod. M . P. M atusxak............. 374

Phosgene, Iodom etric D eterm ination of. M . P. M atuszak................... . 457Phosphorus, Estim ation of Phytin— in Plant M aterials. R . S. Harris

ana L. M . M osher................... •.•••:........................................................... 3120Photoelectric T itration. See Titration.Photronic Colorimeter. See C olorim etric Determ inations.Phytin Phosphorus. See Phosphorus.Pipet, Self-Filling— for Dispensing H ot Caustic Solutions. C . J. B .

T h o r .............................................................................................................................. 326Pipet, Sim ple— for A bsorption. E . A . M eanes and E. L. N ew m a n .. . . 387P l a n t s :

C om bustion M ethod for D eterm ination of Iodine in— Material.J. S. M cIIargue, D . W . Y oung, and R. K . C a lfee ................................ 318

D eterm ination of Acids of— Tissue:II . T otal Organic Acids of T ob a cco Leaf. G . W . Pucher, H . B .

Vickery, and A. J. W akem an................................................................... 140III. Citric Acid. G . W . Pucher, H . B. Vickery, and C . S.

Leavenw orth .............................................................................................. 190D eterm ination of Pentosans in— M aterials Containing Tannins.

A. P. Sakostschikoff, W . T . Iw anow a, and A. M . K u ren n ow a .. . . 205Electrom etric D eterm ination of Chlorides in G round W aters, and

in Ash and Sap of. J. R . N eller. .............................................................. 426Estim ation o f Phytin Phosphorus in— Material. R . S. Harris and

L. M . M osher...................................................................................................... 320Filtering Fruit Juices and Extracts of. J. A. Hall and W . E . B a ie r .. 208Q uantitative Determ ination of Couraarin in— M aterial. I. J.

D uncan and R. B . D ustm an ............................................................... 210Simultaneous Determ ination o f M alic and Citric Acids in— Tissue.

G . W . Pucher, H. B . Vickery, and A . J. W akem an .......................... 288Plastom eter. See R ubber.P l a t i n u m :

Choice of Catalyst for H ydrogen Electrode. A . E . L orch ......... 164Cleaning— W ire for Flam e Tests. W . G . L eighton ....................... 84Separation, D etection , and Estim ation o f Arsenic, G old, Palladium,

Selenium, Tellurium, Iodine, and. R educing A ction o f M er­curous Chloride. G . G . P ierson.......................................................... 437

Portland Cem ent. See Cement.Potash, Determ ination o f— in Fertilizers. F. B . Carpenter and R . O.

P ow ell................................................................................................................... 62Potassium, Analytical Reactions o f Rubidium , Cesium, and. W . J.

O 'Leary and Jacob P apish ........................................................................... . . 107Potassium Chloride, Influence on Indirect D eterm ination of Sodium

of O cclusion o f W ater by Sodium Chloride and. G. F. Smith, F . M .Stubblefield, and E. B . M id d leton ........................................................... 314

Potassium Dichrom ate. See D ichrom ate.Potassium Ferro- and Ferricyanides as Reference Standards in Evalua­

tion o f Titanous Solutions. M ixed Perchloric and Sulfuric Acids.I I . G . F . Smith and C. A. G etz ........................................ 252

Potassium Iodide, Volatilization of Iodine from D ilute Iodine— Solutions. W . A. H ough and J. B . F ick len ....................................... 460

Potassium Permanganate M ethod for Sulfur D eterm ination in Sulfite W aste L iquor and Organic Com pounds. R . N . P ollock and A . M .Partansky................................................................................................................... 330

Potassium Permanganate Titrations, Asbestos in. R . W . Curtis andJ. Finkelstein. (C orrection )............................................................................. 18

Potentiom etric M ethod, R apid— for Q uantitative D eterm ination ofCopper in A lloys. II. B . H ope and M adeline R oss ............................... 316

Potentiom etric Titration in N onaqueous Solutions. I I . A Sourceo f Error in Acidim etry. L . A . W ooten and A . E . R u eh le................... 449

Poultry Lice Pow der. See Insecticides.Powders, Fine, New Apparatus for Determ ination o f Size D istribution

of Particles in. R . T . K n a p p ........................................................................... 662-Propanol. See Alcohols.Propene. See H ydrocarbons.Protein H ydrolysis, M icro H ot-P late for. A . R . P a tton .......................... 201Pyrex Glass Filters. See Filtration.Pyrites, Selenium in. K . T . W illiams and H . G . B y ers .......................... 296

R A D IO , D eterm ination of D ielectric Constants by . M . M . O ttoand H . H . W enzke.................................................................................................. 187

R adio R elay Circuit, Simple— for Tem perature Control. G . B., Heisig and D . C . Gernes. . ........... 155

Rayons, Use of N ew U ltraviolet M icroscope Illum inator with. T . H.D augherty and E. V . H jo r t ................................................................................ 370

Refractive D ispersion, Specific— for Distinguishing betw een DifferentSeries of H ydrocarbons. A . L. W ard and W . II. Fulw eiler................ 396

Refractories, A ction of Sodium Am ide on Silicates and. P. V. Petersonand F. W . B ergstrom ............................................................................................. 136

Resins, Thiocyanogen Numbers of. Nature and Constitution of Shellac. V III . W . H . G ardner, G eorge Pribyl, and H arold W ein­berger ............................................................................................................................ 259

Rosins, Low -G rade, A cid ity Titration of. W . C . Sm ith. (Correction,192; Correspondence, Alfred Tingle, 4 2 2 )................................................... 122

R u b b e r :D eterm ining Flex Cracking in Treads. H arold G ray, H . S. Karch,

and R . J. H u ll...................................................................................................... 265Iodine Value o f— and G utta -P ercha H ydrocarbons as D eterm ined

b y Iodine Chloride. A. R . K em p and G . S. M ueller.......................... 52Measurement o f Q uality in— G oods by Physical Tests. A . W.

Carpenter............................................................................................................... 301Reclaim ed, Testing of. II. F. P a lm er........................................................... 56Rem olding— Stoppers for R educed Pressure Filtration. G . F.

Smith and J. L. G rin g ...................................................................................... 385U nvulcanized, Shearing D isk Plastom eter for. M elvin M o o n e y .. 147

Rubidium , Analytical Reactions of Cesium and. W . J. O ’ Leary and Jacob Papish .............................................................................................................. 107

S A L T S , Inorganic, Determ ination of— in Sulfonated Oils. RalphH a rt............................................................................................................................... 220

S e l e n i u m :D eterm ination o f— and Arsenic b y D istillation. W . O. R obinson ,

H . C. D udley, K . T . W illiams, and H . G . B y ers ............................... 274In Pyrites. K . T . W illiams and II. G. B y ers ............................................ 296Q ualitative M ethod for— in Organic Com pounds. M . J. H o r n . . . . 34Separation, D etection , and Estim ation of Arsenic, G old , Platinum,

Palladium , Tellurium , Iodine, and. Reducing A ction of M er­curous Chloride. G. G. P ierson ............................................................... 437

Shellac, N ature and C onstitution of:V III . Th iocyanogen N um bers o f Resins. W . H . G ardner, G eorge

Pribyl, and^ H arold W einberger..................................................................... 259I X . Determ ination of Solubility in Organic Liquids. W . II.

Gardner and H . J. H arris................................................................................ 400(See also Paint.)

Silica, C olorim etric D eterm ination o f— in Boiler W ater. M . C.S ch w a rtz . ......................................................................................................... 364

Silica, C olorim etric Standards for. H . W . Swank and M . G . M e llo n . . 348Silica Gel, Platinized— as Catalyst in Gas Analysis. II. Oxidation

o f M ethane H ydrocarbons. K . A . K obe and E. B. B rookbank. . . . 35Silicates, Action of Sodium Am ide on Refractories and. P. V. Peter­

son and F. W . B ergstrom ..................................................................................... 130Silver, M etallic— as Ultim ate Standard in Volum etric Analysis. C . W .

Foulk and L. A . Pappenhagen........................................................................... 430Size Distribution, New Apparatus for D eterm ination o f— in Fine

Powders. R . T . K n a p p ....................................................................................... 55Soap, Determ ination of Lead— in Oils and Greases. Harry' L ev in . . . . 333Soda, E ffect o f Fire-Extinguisher Chlorinated H ydrocarbons on D e­

termination o f Phosgene by— M ethod. M . P . M atuszak.................... 374Sodium Am ide, Action o f— on Silicates and Refractories. P. V.

Peterson and F. W . B ergstrom ........................................................................ 136S o d i u m C a r b o n a t e :

Anhydrous— for Standardization. Louis W aldbauer, D . C . M c­Cann, and L. F. T u lcen ................................................................................... 336

Continuous D eterm ination of— Sodium H ydroxide R atio in C arbonD ioxide Absorption System . A. S. S m ith .............................................. 217

D eterm ination of Small Quantities of— b y W arder’s M ethod withIm proved Technic. J. E . S. H a n ............................................................... 209

Sodium Chloride. Influence on Indirect Determ ination o f Sodium of Occlusion of W ater by Potassium Chloride and. G . F . Smith,F . M . Stubblefield, and E. B . M id d leton .................................................... 314

Sodium H ydroxide. See Sodium Carbonate.Sodium N itrate, New Norwegian Process for M anufacture o f .................. 33Sodium , R apid Centrifugal Estim ation of Small A m ounts of. E . R .

Caley, C . T . Brow n, and H . P. P rice ............................................................... 202(See also Sodium C hloride.)

S o i l s :D eterm ination of Base Exchange in— with Copper N itrate. E . A.

Fieger, J. G ray, and J. F . R e e d ................................................................... 281Determ ination of Selenium and Arsenic in— b y D istillation. W . O.

R obinson , H . C . Dudley', K . T . W illiams, and H. G. B y ers 274Determ ination of T ota l Carbon in— by W et Oxidation M ethod .

J. E . A d a m s .. . .................................................................................................... 277Solder, Determ ination of Antim ony in. C . L. B arber............................... 443Solder, Volum etric M ethod for Determ ining Small Quantities of

A ntim ony in. C . W . Anderson........................................................................ 456Solutions, Q uantitative Spectroscopic Analysis of. W . R . Brode and

J. G. S teed .................................................................................................................. 157Solvent Extraction. See Extraction.Soxhlet Extractor. See Extractor.Spectral D eterm ination of Fluorine in W ater. A. W . P etrey ................. 343Spectroscopic Analysis, Q uantitative— of Solutions. W . R . Brode

and J. G . S teed ......................................................................................................... 157

488 A N A L Y T I C A L E D I T I O N Vol. 6, No. 6

Starch, C olorim etric Determ ination of Iodine by— Iodine Reaction.H. Q. W ood a rd .................................................................................................... 331

Starches, V iscosity D eterm ination of D ilute Solutions of CassavaFlour and Other. G . G . Pierson.................................................................... 183

S t e e l :18-8 Chrom ium -Nickel and Low -Titanium , Determ ination of

Colum bium in. Louis S ilverm an............................................................... 287D irect Determ ination o f Chromium and Vanadium in— Usine; o-

Phenanthroline Ferrous Com plex as Indicator. H . H . W illardand Philena Y ou n g ........................................................................................... 48

Stainless— Bom b in O xygen Calorimeter. F. F . F landers................... 258Stillhead. See D istillation.Stirrer. See Agitator.Strontium, D etection of Calcium in Presence of Barium and. E . R .

C a ley ........................................................................................................................... 4458ucrose. See Sugar.Suction D evice. See Filtration.S u g a r :

A cid— Pectin Relationships and Their Bearings upon Routine Evaluation of Apple Pectin. Pectin Studies. II. R . Stuewer,N . M . Beach, and A. G . O lsen . ............................................................ 143

Com parative Clarification of— Solutions b y Copper Reduction and Iodine Titration M ethods. L. G. Say well and E. P. P h illip s .. . . 116

Determ ination of Small Am ounts of G lucose, Fructose, and Invert—in Absence and Presence of Sucrose. R . B . W hitm oyer................. 268

Determination of T otal Reducing— , Dextrose, and Lévulose inR aw Cane Sugars. F . W . Zerban and M . II. W iley ................... 354

D ouble-A cid M ethod of Optical Analysis of Beet Products. S. J.Osborn and J. H . Z isch ................................................................................... 193

Purification of— b y Electrodialysis. A . L. Elder, R . P. Easton,H . E . Pletcher, and F. C . Peterson............................................................ 65

Turbidity in— Products. II. Effect o f Independent Variation ofSuspended and Coloring M atter on Transm ittancy and Tyndall Beam Intensity. F . W . Zerban, Louis Sattler, and Irving Lorge. 178

Volume o f— Beet M arc and Its A dsorptive Effect. S. J. O sb orn .. . 37Sulfide Sulfur. See Sulfur.Sulfite W aste Liquor, Sulfur Determ ination in— and Organic C om ­

pounds by Potassium Permanganate M ethod. R . N. Pollock andA. M . Partansky.................................................................................................... 330

Sulfonated Oils. See Oils.S u l f u r :

Agitator for— Titrations b y Lamp M ethod. Lyle D o la n ..................... 388D eterm ination in Sulfite W aste Liquor and Organic Com pounds by

Potassium Perm anganate M ethod. R . N . Pollock and A. M .Partansky.................................................................... 330

Determ ination o f Sulfide— in Alkaline Solutions Containing Other—C om pounds. E . L. Baldeschw ieler.............................................................. 402

M odification o f A . S. T . M . Lam p for D eterm ination of— in Benzeneor Gasoline. H . O. E rv in ................................................................................ 225

Sulfide, D eterm ination of M inute Quantities of. C . E . L ach ele. . . 200S u l f u r i c A c i d :

M ixed Perchloric and:I. Simultaneous Oxidizing and Reducing Properties o f H ot

Concentrated Perchloric Acid . G. F. Sm ith.................................... 229II . Potassium Ferrcn and Ferricyanides as Reference Standards

in E valuation of Titanous Solutions. G. F . Smith and C . A .G etz ......................................................................................................... 252

New Volum etric M ethod for D eterm ination of Sulfate. V . R . Damereil and H . H . S trater.......................................................................... 19

T A N N IN S , D eterm ination o f Pentosans in Vegetable M aterials C on ­taining. A . P. Sakostscbikoff, W . T . Iwanowa, and A . M . K uren-now a ............................................................................................................. 205

Tar. Exam ination of Phenols of Low -Tem perature Coal Tar. 8.Caplan, J. Ross, M . G . Sevag, and T . M . Sw itz....................................... 7

T e l l u r i u m :Determ ination of— in— Lead and in— Antim onial Lead. W . J.

B row n ............................................... 428Separation, D etection, and Estim ation of Arsenic, G old, Platinum,

Palladium. Selenium, Iodine, and. Reducing A ction of M er-curous Chloride. G . G . Pierson................................................................. 437

Separation of G old from . V ictor Lenher, G . B . L . Smith, and D . C.Knowles, Jr........................................................................................................... 43

Temperature Control, Simple R adio Relay C ircuit for. G. B . Heisigand D . C . G ernes.................................................................................................... 155

Thiocyanogen Num ber. W . J. W iley and A. H . G ill.............................. 298T hiocyanogen Numbers o f Resins. Nature and C onstitution of

Shellac. V III . W . H . Gardner, G eorge P ribyl, and Harold W ein­berger........................................................................................................................... 259

T i n :Ceric Sulfate for Estim ating— in Bearing M etals. L . G . Bassett

and L. F. S tu m pf............................. 477Estim ation of Small Am ounts o f Bism uth, A ntim ony, M olybdenum ,

and— in Copper. Bartholow P a rk .................... ....................................... 189

Solid Carbon D ioxide in Determ ination of. H . I . W h ite ............... 234Volum etric M ethod for D eterm ining Sm all Quantities o f A ntim ony

in. C . W . Anderson ......................................................................................... 456Tire Treads. See Rubber.T i t a n i u m :

And Vanadium in G roup II I . Inclusion o f Rarer M etals in Ele­mentary Qualitative Analysis. II. L. E . P orter ............................... 448

Low — Steel. See Steel. . . .Pure— Oxide as Standard in Volum etrio Estim ation o f. W . W .

Plechncr and J. M . Jarm us................... 447Titanium Oxide. See preceding item.Titanous Solutions, Potassium Ferro- and Ferricyanides as Reference

Standards in Evaluation of. M ixed Perchloric and Sulfuric Acids.II. G. F. Smith and C . A . G etz ............................................................. 252

T i t r a t i o n :Agitator for Sulfur— b y Lam p M ethod . L yle D o la n ............................. 388D ivided— Flask. J. W . Y o u n g ......................................................................... 388Photoelectric, Simple Apparatus for. W . W . Russell and D . S.

L atham ............................. .............................................. .* • • ; ........... 463T ob a cco Leaf, Total Organic Acids of. D eterm ination o f Acids of

Plant Tissue. I I . G . W . Pucher, II. B . Vickery, and A. J. W ake-m an ........................................................................................................................ 140

Tonom eter. See Paint. _ tTrichlorobenzene in Analysis of G raphite Greases. F. M . B if fe n .. . . 169Trichloroethylene, Chemical E xam ination o f— for Anesthesia. H . L.

T schentke.............................................................................................................. • • 21Triethanolam ine Oleate, E xtraction o f— from A queous Solution.

F . M . Biffen and F . D . Snell. (C orrection , 2 2 8 ) ............................... 78Trypsin in D eterioration of Stored E g g s ................................................. 255Tungsten and M olybdenum in G roups I and I I . Inclusion o f Rarer

M etals in Elem entary Q ualitative Analysis. I . L . E . P o r t e r . . . . 138Tungzten, M ethod Proposed by D otreppe for Volum etric D eterm ina­

tion of. M . L. H o lt ....................................................................................... 476Tw itchell M ethod. See Acids.Tyndall Beam. See Sugar.

U L T R A V IO L E T M icroscope Illum inator. See M icroscope.

V A C U U M Regulator, A utom atic. G . F . Liebig, Jr............................. 156Vanadium and Titanium in G roup II I . Inclusion of Rarer M etals in

Elem entary Qualitative Analysis. II . L . E. P orter .......................... 448Vanadium , D irect D eterm ination of Chrom ium and— in Steel Using

o-Phenanthroline Ferrous Com plex as Indicator. II. H . W illardand Philena Y o u n g ..................................................... ........................... <........... 48

Vegetables. Determ ination of Peroxidase A ctiv ity in Fruits and.D . A . P a ck ..................................................................................................................... 170

Viscom eter, Autom atic M odified Falling-Sphere. B . A. Jon es 80Viscosity Determ ination of D ilute Solutions of Cassava F lour and

Other Starches. G . G. P ierson ....................................................................... 183Viscosity of Petroleum Products. E . A . W illihnganz, W . B . M cCluer,

M . R . Fenske, and R . V . M cG rew ............................................................. 231Vitam in A , Determ ination of Carotene as M eans o f Estim ating—

Value of Forage. H . R . G uilbert....................................................................... 452

W A R D E R ’ S M ethod. See Sodium Carbonafo.W a t f . r : . . . , . . .

Boiler, C olorim etric D eterm ination of Silica in.^ M . C . S ch w a rtz .. 364G round, E lectrom etric D eterm ination o f Chlorides in Ash and Sap

of Plants and in. J. R . N eller ............................................. 426N atural, Application o f Photronic Colorim eter to D eterm ination of

Fluoride in. L . V . W ilco x ................................ >........................ 167N atural, D eterm ination of Fluorides in. J. M . S anch is........................ 134Spectral D eterm ination of Fluorine in. A . W . P etrey .......................... 343

W hisky, D eterm ination o f Artificial Color in. G . E . M allory andPeter V alaer.................................................................................................................. 474

W ood , Chemical Studies o f— Preservation:I. Problem and Plan o f A ttack . R . R . W illiam s........................... ... 308II . Sampling Poles for Chem ical Analysis. R . E . W aterm an and

C . O. W ells ........................................................................................................ 310Appendix. R . L. Peek, Jr................................................................ .. • • • • • •• 313III. Analysis o f Preserved T im ber. R . E . W aterm an, F . C . K och ,

and W . M cM a h on . 409IV . Small Sapling M ethod o f Evaluating W ood Preservatives.

R . E . W aterm an, and R . R . W illiam s........................................................... 413

Z IN C , M icrom ethods for D eterm ining. P. L . H ib b a rd ......................... 423Zinc, M odified H ydrogen E volution M ethod for M etallic M agnesium ,

Alum inum , ana. R . H . K ra y ......................... 250Zirconium Purpurin Teat in D etection and Estim ation of Small

Am ounts of Fluorine. I. M . K olthoff and M . E . S tan sb y .................... 118