JuNg 16, 1944 SCIENCE-ADVERTISEMENTS 9

-.-E E-E~

NEW WILEY BOOKSORGANIC SYNTHESES. Volume 24

DR. NATHAN L. DRAKE, Editor-in-Chief.

Tested laboratory methods for preparing various organic chemical reagents in one-half-pound to five-pound lots.This volume covers the preparations worked out in this past year. Style changes have been made to increase theuniformity and up-to-dateness of this volume. Ready in July. Approx. 115 pages; 6 by 9; $1.75

SCIENTIFIC SOCIETIES IN THE UNITED STATESBy RALPH S. BATES, formerly of the History Department, Massachusetts Institute of Technology.

This is the only book to give a full-scale account of the evolution of American scientific organizations. Here is thestory, covering two and one-half centuries, of these societies-local, state, and national, as well as those in thespecialized branches, ranging from astronomy to zoology. Of particular interest today is the picture which thebook gives of the mobilization of American science for the war effort. It shows not only how it was done in thefirst World War, but how it has been accomplished in the present conflict. A Massachusetts Institute of TechnologyPress Book. Ready in August. Approx. 264 pages; 5j by 81; Probable price, $3.50

DANA'S SYSTEM OF MINERALOGYVol. I-Elements, Sulfides, Sulfosalts, Oxides

Rewritten by CHARLES PALACHE, HARRY BERMAN, and CLIFFORD FRONDEL; All at HarvardUniversity.

A classic work, so thoroughly revised as to be essentially a new book. The changes include: a new mineral classi-fication; a new elastic series of classification numbers for species; new data derived from x-ray crystallography,and a new form of presentation of crystallographic data; revision of specific gravities, based on new observations;introduction.of the optical characters of the opaque minerals; a new chemical treatment of species; a new methodof treating a series of minerals as if it were a single-species description; expansion of the annotation and referencesection. Ready in July.

Seventh Edition, Volume I: Approx. 803 pages; 6 by 9.

THEORY OF X-RAY DIFFRACTION IN CRYSTALSBy W. H. ZACH4RIASEN, Associate Professor of Physics, University of Chicago.

This book provides a complete and logical presentation of the foundations of the field of crystal structure, that is,it deals with principles and underlying theory. The content includes complete presentations of the theory of theinternal structure of crystals, the theory of X-ray diffraction in ideal and real crystals, and of other specific theoriesnow in use in the interpretation of the experimental data. Ready in August.

Approx. 253 pages; 5I by 81; Probable price, $4.00

JOHN WILEY & SONS, Inc., 440-4th Ave., New York 16, N. Y.

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JUMB 16, 1944 SCIENCE-ADVERTISEMENTS- 9

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SCIENCE-SUPPLEMENT VOL. 99, No. 2581

SCIENCE NEWSScience Service, Washington, D. 0.

A NEW STAR CAMERAA NEW sky camera that enables engineers, surveyors,

and astronomers to determine their location, by photo-graphing the night sky directly overhead, was reportedat the Washington meeting of the American GeophysicalUnion by Lt. Julius L. Speert, of the U. S. Army AirCorps.

The new camera takes a standard 4 by 5 inch plateand is set on a tripod so that it photographs a portionof the sky directly above, showing the stars in the vicinityof the zenith. Attached to this camera is another smallercamera, usually 35 millimeter size, which takes a pictureof a clock at the same instant as the photograph of thestars is taken. With this information, the sky-photogra-pher can determine his exact location.To simplify the problem of identifying the stars pho-

tographed, a special light box has been developed. Thelight box contains a glass window which is illuminatedfrom behind. Directly back of the glass plate there is a

long strip of thin film mounted on two spools. On thefilm is drawn a special diagram covering the full regionfrom the equator to the pole, and to the same scale as thephotographic plates.With the star photograph, and the time it was exposed

known, and the approximate longitude of the point atwhich the exposure was taken also known, it is possibleto determine the exact latitude within one or two seconds,by placing the photograph on the glass window of the lightbox and moving the film into the proper position.With these data the stars may be quickly identified by

referring to any competent star map or catalogue of stars.

ITEMSA FAINT comet was discovered on May 16 by Dr. H.

van Gent, of the Union Observatory at Johannesburg,South Africa. Located in the constellation of Vela, itwas of the twelfth magnitude. Moving northward, thecomet may eventually become high enough above thesouthern horizon for northern observatories to sight it.Further observations must be made, however, before it can

be determined whether the diffuse-appearing comet is in-creasing or decreasing in brightness. At present it is-far too faint to be observed by amateur astronomers. Theposition of the comet on May 23, as cabled to HarvardObservatory, astronomical clearing house for the UnitedStates, was at right ascension 9 hours 25 minutes, anddeclination minus 49 degrees 20 minutes. It was movingnorthward at a rate of about 42 minutes per day, andeastward with a speed of 2 minutes 36 seconds. Dr. van

Gent also discovered a ninth magnitude comet last Novem-ber.

PAIN and the dry socket condition that plague patientsand dentists after a tooth has been pulled are often dueto the patient's being undernourished and below par

physically, Dr. Vernor H. Eman, dental surgeon of Grand

Rapids, Mich., reports in the Journal of Oral Sur-gery, published by the American Dental Association."The majority of patients for extraction are taken, wemight say, literally 'off the street,' " Dr. Eman states."They come in because they have a toothache or because,for some reason or other, and possibly without the adviceof a physician, they have decided that certain teeth shouldbe removed. A satisfactory and complete evaluation ofthe patient 's physical condition is, under such circum-stances, hardly possible. An undernourished patient is apoor risk for any operation, and that applies quite asdefinitely to minor as to major surgery. Undernourish-ment may be present, of course, for reasons other thandeficiencies of diet, but the most impressive of all caseshave been the dietary deficiency cases."

ONE out of every ten eye accidents can be blamed onattempts of amateurs to remove a particle lodged in theeye. More than half of the people forced to wear artifi-cial eyes were victims of accidents, it was revealed in asurvey on artificial eye wearers recently completed in ninemajor cities by Paul Gougelman, artificial eye manufac-turer, in cooperation with the Greater Chicago SafetyCouncil. Flying chips of wood caused 15 per cent. of alleye injuries. Falls around the home, and careless use ofscissors, wire, nails and hammers accounted for a largenumber. On-the-job accidents, where pieces of steel en-tered the eyeball, accounted for one out of every seveneye injuries. The number of eye accidents in industry,however, is sharply decreasing with the use of modernsafety devices such as goggles, safety masks and helmets.

A NEW heat-resistant plastic that can withstand boiling,and dry heat as high, has been announced by theMonstanto Chemical Company. Developed by Dr. ReidFordyee and Dr. David T. Mowry, the new plastic hasalready found wide use in war work, particularly radar,radio and other military electronic equipment where mate-rials of lightweight, suitable electric and great heat-resistant properties are needed. It is also being usedfor surgical instruments, since it can be sterilized. Dr.Charles Allen Thomas, director of Monsanto central re-search laboratories, describes the new plastic as "a ther-moplastic, readily moldable in standard molding machines,and combining high resistance to heat with resistance tostrong, corrosive chemicals, excellent electrical insulatingproperties, and high rigidity and strength. " The new

thermoplastic is a synthetic co-polymer containing carbon,hydrogen and nitrogen. Officers of the Monsanto Chemi-cal Company are withholding any additional informationabout the new plastic, including its exact chemical com-position, pending action on patents. The plastic has beengiven the commercial name Cerex. After the war, a widerange of civilian applications are possible, wherever heat-resistant qualities are in demand, such as dishes andutensils that are subjected to boiling water in washing.

10

JUNE 16, 1944 SCIENCE-ADVERTISEMENTS 11

GENERAL CHEMISTRY

By JOHN ARREND TIMMProfessor of Chemistry and Director of School of Science, Simmons College

International Chemical SeriesHere is a text that should quickly take its place among the leading books in thefield of general chemistry.

It is designed to meet the needs of those students who plan to use chemistry intheir professional education, and is suitable for use both by those who have had no

previous course in chemistry and by those who have completed an elementarycourse in a secondary school.

Noteworthy Features1. Writing in a vigorous, almost conversational

style, Professor Timm talks to the student ashe would in his own classroom, explainingthings clearly and graphically in a manner thatgives zest to the course and inspiration to thestudent.

2. The sound modern approach is not encumberedwith the remnants of dead theories that makeso many texts unnecessarily difficult for be-ginners.

3. More space than usual is devoted to a carefuldiscussion of the fundamental theory. Repeti-tion of important principles occurs frequentlyand in each case the treatment is more quanti-tative and complete. By this device review isencouraged; the student's command of the sub-ject is broadened, and the material more firmlyfixed in his mind.

4. The treatment of the theory is modern. TheLowry-Bronsted acid-base definitions are usedconsistently. The older definitions, however,are carefully pointed out as a special case thatis incorporated in the general ones. Recentindustrial developments are included.

5. The material on atomic structure and the na-ture of valence has been applied to a study ofthe states in which matter may exist. Thenature and magnitude of the forces of attrac-tion between ions, atoms, and molecules are dis-cussed so that the student may explain thefundamental physical properties of the sub-stances that he investigates in the laboratory.

6. Each chapter is followed by a group of exer-cises, including both questions and problems.

7. An unusually attractive format, and illustra--tions and drawings of exceptional quality andinterest, have resulted in a truly distinctiveexample of bookmaking.

Send for a copy on approval

McGRAW-HILL BOOK COMPANY, Inc.330 West 42nd Street, New York 18, N. Y.

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JUNE 16, 1944 SCIENCE-ADVERTISEMENTS 11

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CONTENTSPRELIMINARY STUDYPROCEDURESTAR IDENTIFICATIONPRACTICAL WORK IN THE AIRFURTHER STUDYP. Z. X.ASTRONOMYTHE M. K. IX SEXTANTSTAR CURVES

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IT contains all the basic theories thatthe practical navigator requires, but

the theoretical work has been cut to aminimum and the space thus gained hasbeen used for such useful matter as thefollowing "suggested routine"."(a) Navigator brandishes sextant be-fore pilot, who nods, and commences totrim aircraft carefully."(b) Navigator takes station in dome,and timekeeper beside the pilot, withastro watch and pencil and pad."(c) Navigator pre-sets sextant for ob-servation, nods his head to timekeeper,who raises his thumb in front of pilot.Pilot commences to concentrate."And so on.From his experience as a lecturer, theauthor has no doubt discovered the follyof trying to make a student plunge atonce into the depths of the PZX tri-angle and drown all interest in the seaof spherical trigonometry. SquadronLeader Hadingham reserves PZX untilthe sixth of his nine chapters andchooses only the essential definitions asthe contents of Chapter I, followingthem with such interesting topics as theprocedure for working out a sight, staridentification and practical work in theair.The Mark IX Sextant and Star Curvesare adequately dealt with and the readeris throughout impressed by the simplic-ity of Astro-Navigation when tackled inthe right way. Even Coriolis seems tobe child's play.-The Aeroplane.

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VoL. 99, No. 258112 SCIENCE-t-ADVERTISEMENTS

Ju. 16, 1944SCIENCE-ADVERTISEMENTS 13

LABORATORYPRACTICE OFORGANIC

CHEMISTRY

Revised Edition

By G. ROSS ROBERTSONUniversity of California

The unusually full and clear discussionof theory which distinguished the firstedition of this text has been further clari-fied and expanded in this new edition.The 70 experiments in the second part ofthe book allow for considerable choice,and cover thoroughly all important topicsin organic chemistry. Among the many

experiments added in the new edition are

about a dozen entirely new ones, notfound in other comparable manuals, whichoffer both teacher and student a refresh-ing change from the routine work. $2.50

INTRODUCTORYGENERALCHEMISTRY

Third Edition

By STUART B. BRINKTEYYale University

A complete revision along the lines of thelatest revision of the author 's " Principlesof General Chemistry" brings this textup to date. This book has been especiallypopular for classes of students who havehad no previous training in chemistry inhigh school or preparatory school. Whileit is a little less rigorous than the " Prin-ciples" text, it is very thorough andmaintains the same high standards ofscientific exactness and clarity which char-acterize Professor Brinkley's other work.Ready in the fall. $3.50 (probable)

TEXTBOOK OFQUANTITATIVEINORGANICANALYSIS

Revised Edition

By KOLTHOFF & SANDELL

University of Minnesota

This text, long noted for its comprehen-sive and thorough treatment of quantita-tive analysis, is now brought completelyup to date. Among the many new im-provements are the extensive discussionsof modern abridged spectrophotometryand errors in analytical chemistry; a com-

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FUNDAMENTALPRINCIPLESOF PHYSICALCHEMISTRY

By PRUTTON & MARONCase School of Applied Science

Every part of this new basic text in phys-ical chemistry is evidence of the authors'complete knowledge of their subject. Itis clearly written and extremely thoroughin all fundamentals. Thermodynamics isintroduced early and used throughout.The whole book contains the most recentinformation, including an unusually fulltreatment of the important principles ofelectrochemistry. It includes 454 origi-nal problems. Ready in the summer.

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SCIENCE-ADVERTISEMENTS 13'JUNz 16, 1944

14 AWEC-DERIE T VO.9,N.28

7 GCARTER'S MICROBIOLOGY& PATHOLOGY

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By CHARLES F. CARTER, B.S., M.D.,Director, Carter's Clinical Laboratory,

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About 700 pages, illustrated.PRICE, about $3.50

Dr. Carter's purpose in revising his populartext is to add material which will bring itcompletely up to date without materiallyincreasing the size of the book.

All chapters have been carefully scrutinized,some have been omitted, others have beencombined. In no case have essential detailsbeen omitted.

Added stress has been given the part thatmicrobes play in the processes of nature,

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Chapters on sterilization and disinfectionhave been brought into line with modernhospital procedures.

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References have been revised, obsolete ones

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THE C. V. MOSBY COMPANY3525 Pine Blvd.St. Louis 3, Mo.

Gentlemen: Reserve my copy of Carter's MICROBIOLOGY AND PATHOLOGY and-send it to me as soon as it comes from the press. The price will be about $3.50.

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SCIENCE-ADVERTISEME.NTS VOL.. 99, No. 2581'14

JUNE 16, 1944 SCIENCE-ADVERTISEMENTS

BLAKISTON TEXTBOOKS

* Wertheim- Introductory Organic Chemistry|By E. Wertheim, University of ArkansasThis is a text for the short course stressing vital concepts. It will ground the stu-dent in such fundamentals as the appreciation of the significance of the graphicformula, the importance of functional groups in the reactions of compounds, andrelationships of simple compounds to each other. Summaries, review questions andcharts are provided. 82 Illus. 482 Pages. $3.00 (1942)

Experiments in Organic ChemistryDesigned to accompany "Introductory Organic Chemistry," this manual -offers awide selection of experiments in elementary organic chemistry covering both "prep-arations" and "properties." 34 Illus. 221 Pages. $1.35 (1942)

Textbook of Organic Chemistry |This successful text was designed for students majoring in chemistry or specializingin organic chemistry and for those taking premedical or chemical engineeringcourses. Many helpful charts, summaries and tables are included. 110 Illus. 830Pages. $4.00 (1939)

Laboratory Guide for Organic Chemistry2nd Edition

This guide presents well selected experiments for a year 's laboratory work. Briefdirections for experiments in identification of compounds and a short section onspot tests are included. 24 Illus. 560 Pages. $2.00 (1940)

* Hill & Kelley Organic ChemistryBy G. Albert Rill, Wesleyan University, and Louise Kelley, GoucherCollegeThis text offers material for a rigorous full year 's college course. Helpful ques-tions and well selected problems are given at the end of each chapter. Widelyadopted, the text is highly praised by teachers for its clarity of expression andlogical arrangement. 919 Pages. $4.00 (1943)

* Davies-Fundamentals of Physical Chemistry-2nd Edition

By Earl C. H. Davies, West Virginia UniversityThis text is being successfully used for a one semester, nonmathematical course.It provides the necessary background for applications of physical chemistry tobiological problems. 86 Illus. 447 Pages. $3.50 (1940)

THE BLAKISTON COMPANY PPhidehia

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SCIENCE-ADVERTISEMENTS VOL. 99, No. 258116

cAnnouncing: VOLUME XIIIANNUAL REVIEW OF BIOCHEMISTRY

Editor: J. MURRAY LucKPublished by Associate Editor: JAMES H. C. SMITH

ANNUA RE IN . l lEditorial Committee:ANNUAL REVIEWS, INC. H. J. ALMQUIST

D. R. HOAGLANDJune 1, 1944 C. L. A. SCHMIDT

H. A. SPOEHR

"This series of volumes . . . has been growing in importance and value with the years, until now it constitutes the best sourceof information biochemists have aside from the original papers on which the reviews are based." (Plant Physiology, 18:539-540, 1943)"This series of annual volumes continues to offer the most important and comprehensive reviews in the field of biochemistry."(The Bakers Digest, Vol. XVII, No. 4, August, 1943)

CONTENTS: Biological Oxidations and Reductions, D. E. Green; Non-oxidative Enzymes, T. Mann and C. Lutwak-Mann;Chemnstry of Carbohydrates, W. Z. Hassid; Chemistry of Lipids, J. B. Brown; Chemistry of Steroids, F. C.Koch; Chemistry of Proteins and Amino Acids, H. Neurath and J. P. Greenstein; Chemistry and Metabolismof the Compounds of Phosphorus, A. Green and Sidney Colowick; Carbohydrate Metabolism, E. A. Evans,Jr.; Fat Metabolism, E. M. MacKay; Metabolism of Proteins and Amino Acids, C. P. Berg; Biochemistryof Nucleic Acids, Purines and Pyrimidines, H. Loring; Mineral Metabolism, R. A. McCance and E. M.Widdowson; Chemistry of Hormones, H. Jensen; Water-Soluble Vitamins, J. C. Keresztesy; Fat-SolubleVitamins, W. C. Russell; Nutrition, W. H. Sebrell; Nutritional Deficiencies in Farm Animals, C. F. Huffmanand C. W. Duncan; Biochemistry of Malignant Tissue, D. Burk and R. J. Winzler; Alkaloids, R. H. Manske;Chemistry of Synthetic Drugs, F. F. Blicke; Photoperiodic Responses in Plants, K. C. Hamner; ChloroplastPigments, H. H. Strain; Mineral Nutrition of Plants, F. J. Richards; Plant Growth Substances, J. van Over-beek; Biochemistry of Fungi, E. Tatum; Histochemistry, D. Glick.

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ANNUAL REVIEWS, INC.Approximately 720 pages S r . $5.00 per copy (American funds)Author and Subject Indexes Stanford University P.O., California Postpaid in U. 8. A.

RELAPSING FEVERviii + 130 pages (7 x 10i inches), 14 illustrations, 23 contributors, references,

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Relapsing Fever is the eighth symposia volume on important public health prob-lems. This volume is of immediate importance to public health officers and practisingphysicians as well as specialists. The subj ects covered include Distribution, Parasitol-ogy, Tick Vectors, Epidemiology, Symptomatology, and Public Health Aspects.

The volume was prepared by a committee of leaders in this field of research, namely,Frederick G. Novy, Honorary Chairman, Malcolm H. Soule, Chairman, Sidney W. Bohls,Gordon E. Davis, Hardy A. Kemp, Walter H. Moursund, and Herlin L. Wynns.

Price, $3.00; special price tomembers of the Association on request.

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6_wBacto-Agar

Bacto-Agar is a purified Agar prepared fromdomestic material. In the manufacture ofBacto-Agar extraneous matter, pigmented portions,and salts are reduced to a minimum, so that thefinished product in the form of fine granules willdissolve rapidly, giving clear solutions.

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