12
JUN 15 195SINEAVRIEET Hegner s COLLEGE ZOOLOGY Well known as the outstanding text in its field this general survey for students who will not take advanced work is here happily combined with detailed instruction sufficient for those who will. In the organization of material, the author's purpose has been to train students in the methods of scientific investigation. 5th Ed. $3.75 Bruner's LABORATORY DIRECTIONS IN COLLEGE ZOOLOGY corresponds with Hegner's College Zoology but is sufficiently detailed and comprehensive for use with standard texts other than Hegner's. 3rd Ed. $1.75 Huettner's FUNDAMENTALS OF COMPARATIVE EMBRYOLOGY OF THE VERTEBRATES A modern approach and interpretation, thorough scientific accuracy, and original copperplate illustrations, all exceptionally clear, detailed, and accurate, make this an unusually fine text for students of embryology. $4.50 Essig's COLLEGE ENTOMOLOGY This foundation text in entomology covers the history of the 33 orders of insects, emphasizing those species which, because of their historical back- -ground, economic importance, or unusual and interesting appearance, should be known to all students of natural history. Full lists of families, keys for separating the various categories of insects, and abundant illus- trations, largely original, are included. $5.00 Walter's BIOLOGY OF THE VERTEBRATES This text has long been a favorite with students and teachers alike for its exceptionally readable, interesting style; its completeness and clear or- ganization of content; and its wealth of well-drawn, helpful illustrations. It presents all the materials which are useful in college courses on the vertebrates or on comparative anatomy. Rev. Ed. $4.00 7H I, 60 At Anlc'e, tad 1II JUNE, 15, 1945 SCIENCE-ADVERTISEMENTS 9

JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

  • Upload
    others

  • View
    0

  • Download
    0

Embed Size (px)

Citation preview

Page 1: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

JUN15195SINEAVRIEET

Hegner sCOLLEGE ZOOLOGY

Well known as the outstanding text in its field this general survey forstudents who will not take advanced work is here happily combined withdetailed instruction sufficient for those who will. In the organization ofmaterial, the author's purpose has been to train students in the methodsof scientific investigation. 5th Ed. $3.75

Bruner's LABORATORY DIRECTIONS IN COLLEGE ZOOLOGYcorresponds with Hegner's College Zoology but is sufficiently detailed andcomprehensive for use with standard texts other than Hegner's. 3rd Ed.$1.75

Huettner'sFUNDAMENTALS OF COMPARATIVEEMBRYOLOGY OF THE VERTEBRATES

A modern approach and interpretation, thorough scientific accuracy, andoriginal copperplate illustrations, all exceptionally clear, detailed, andaccurate, make this an unusually fine text for students of embryology.$4.50

Essig'sCOLLEGE ENTOMOLOGY

This foundation text in entomology covers the history of the 33 orders ofinsects, emphasizing those species which, because of their historical back--ground, economic importance, or unusual and interesting appearance,should be known to all students of natural history. Full lists of families,keys for separating the various categories of insects, and abundant illus-trations, largely original, are included. $5.00

Walter'sBIOLOGY OF THE VERTEBRATES

This text has long been a favorite with students and teachers alike for itsexceptionally readable, interesting style; its completeness and clear or-ganization of content; and its wealth of well-drawn, helpful illustrations.It presents all the materials which are useful in college courses on thevertebrates or on comparative anatomy. Rev. Ed. $4.00

7H I, 60 AtAnlc'e, tad 1II

JUNE, 15, 1945 SCIENCE-ADVERTISEMENTS 9

Page 2: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

SCIENCE-SUPPLEMENT

SCIENCE NEWSScience Service, Washington, D. C.

THE SCARCITY OF SCIENTIFIC ANDTECHNICAL MEN

WAR has all but stopped basic, academic research inchemistry and has stopped the training of new researchchemists and chemical engineers, Dr. Roger Adams, lead-ing organic chemist, head of the department of chemistryof the University of Illinois and head of chemical workof the U. S. Office of Scientific Research and Develop-ment, charged in a recent radio talk."Basic scientific research finds new truths, and supplies

new material upon which much of the industrial progressof the future depends," Dr. Adams said. "Years willbe required before basic research activity again reachesits prewar level." The war also has stopped the training of new research

chemists and chemical engineers. Thousands of academicand industrial chemists have been drafted into the armedservices with only a few of them in a position where theycan use their technical knowledge."The research organizations associated with industry,

which find new products and upon which industry reliesfor expansion and for creation of new jobs, are at a lowebb. There is no possibility that they can recover quicklyin the near future. This is a matter of great concern tothe scientists and should be to the public, for only byyears of patient research by trained and competent in-vestigators can we maintain the high level of achievementin the field of science, on which is based position of emi-nence among nations."

Dr. Adams talked during the intermission of the NewYork Philharmonic Symphony broadcast sponsored by theUnited States Rubber Company.

R. J. DEARBORN, president of Texaco Development Cor-poration, reports that expansion of industrial researchafter the war by small companies will be limited byscarcity of scientific and technical men.

"'One of the most serious problems of industry is thedeficit in fully trained young professional men for post-war employment," Mr. Dearborn declared. "This coun-try is faced with a period during which the demands ofwar-stimulated technology will not be met by an ade-quate supply of scientists and engineers. As research isthe backbone of industrial progress and creation of jobsin the postwar era, the lack of a sufficient number of well-trained scientists will have a profound effect on inventionand plans of corporations to provide for many newproducts. "War has prevented the normal flow of trained young

men from the colleges, and a great number of trained men,now in the armed services and in war jobs, will find itdifficult to return to their old work due to disuse of theirtechnical abilities. Training of scientists in the collegeshas almost come to a standstill, and it will be 1950 beforea normal flow of technical graduates can be expected.Government will probably compete with industry for

scientific personnel after the war, Mr. Dearborn stated,since the government will probably intensify its research

activities. In addition, there will be a great demand forUnited States technical personnel abroad, due to the tre-mendous reconstruction work which will- be needed. Stillother trained persons will go to colleges and universitiesas teachers.

ITEMSCopyright, 1945, by Science Service

THE two hundred and twentieth anniversary celebrationof the Soviet Academy of Sciences, to be held late inJune, will, in addition to meetings, include a popularfestival honoring the scientists of the U.S.S.R and whatthey have done to serve their nation in peace and war.The academy consists now of 145 academies, includingsome of the leading figures in Soviet science, among themDr. V. Kiomarov, botanist, who is president; Dr. P.Kapitsa, physicist; Dr. N. Semenov, chemist; Dr. I.Vinogradov, mathematician; Dr. I. Orbeli, physiologist,and Dr. N. Burdenko, surgeon. Fifty-seven institutes orsections equivalent to institutes are conducted by theSoviet Academy, with a total staff of more than 5,000scientific and technical workers. The work is divided intoeight departments: Physics and mathematics, chemistry,geology and geography, biology, technology, history andphilosophy, economics and law, literature and language.

THE largest British airplane yet to take to the air isthe 58-ton four-engined Shetland Flying Boat that couldfly from London to Bombay, about 4,650 miles, non-stopat 184 miles an hour. It is larger and has a longer rangethan the American-built Martin ' Mars, ' the largestU. S. flying boat. The airplane is a double-deck shipwith accommodations for 70 passengers and a crew of 11,and is fully air-conditioned. There are three main com-partments as well as a promenade on the after upper deck,a fully equipped kitchen and rest rooms. The new giantof the sky, built by Short Brothers, is powered by four2,500 horsepower Bristol Centaurus air-cooled, 18-eylinderengines. These powerful engines turn four-bladed pro-pellers which have blades measuring 15 feet, 9 inches inlength. The wingspan of the Shetland is 150 feet,greater than of a B-29 Superfortress, and it has anoverall length of 110 feet. Fuel tanks carry more than6,000 gallons of gasoline and 320 gallons of oil.

A NEW fuel substitute for gasoline that gives one-fourthmore power in a properly designed internal-combustionengine is reported by Donald B. Brooks, of the NationalBureau of Standards. A blend of certain non-hydrocar-bons, the fuel, if used in an ordinary gasoline engine, maygive up to 5 per cent. more power than gasoline. Mr.Brooks stated that the components of the new blend Areethyl alcohol, diethyl ether, acetone and butanol. Thesecan also be used "straight" in some- cases. His con-clusions are based upon tests of substitute motor fuelsconducted in a precision single-cylinder variable com-pression engine in the bureau 's automotive laboratoryat the request of the Foreign Economic Administrationof the Office for Emergency Management.

10 VOL. 101, No. 2633

Page 3: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

JUNE 15, 1945 SCIENCE-ADVERTISEMENTS 11

I~~t~ wG460 IHANDBOOK OF. METEOROLOGY

Edited by F. A, BERRY, JR., COMDR., USN, Staff Comair 7th Fleet; E. BoLAY, LIEUT. COMDR.,USNR, Aerological Staff, Postgraduate School, U. S. Naval Academy; and N. R. BmEES, LiEUT.,USNR, Aerological Staff, Postgraduate School,U. S. Naval Academy. In press-ready in July

The most complete work of its kind ever published, thishandbook constitutes an invaluable text and referencebook covering the entire subject of meteorology, and pre-

senting a wealth of authoritative information needed by

both the beginner and the expert in the field. Every sec-tion is profusely illustrated with selected photographs,maps, sketches, and line drawings.

THE CHEMICAL PROCESS INDUSTRIESBy R. NORRIS SHREvE, Purdue University. Chemical Engineering Series. 941 pages, 54 x 84.Textbook edition, $6.00

Present-day teaching trends in chemical engineering are

reflected in this important new book. Offering a definitelyfresh approach, the author follows factory practice inbreaking down the actual industrial procedures into unit

operations and unit processes, not only in the flow sheets,but in the supplementary text as well. Over 100 flowsheets are included. The book covers all recent advancesin the field.

INTRODUCTION TO INDUSTRIAL CHEMISTRYBy W. T. FRE, General Electric Company, and ALBERT C. HOLLER, United States MetalProducts Company. In press-ready in June

In this forthcoming book two industrial chemists providean exceptionally clear and interesting elementary text,especially suitable for use in training classes within in-dustry, and, in general, with students of limited scientific

background. The first third of the book covers funda-mental chemical principles, and the other two thirds dealwith representative industrial applications. Constantreference is made to familiar everyday phenomena.

ELECTROMAGNETIC ENGINEERING. Vol. I-Fundamentals

By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages,

51 x 8i. $6.00The first of a series of three volumes, this book gives a The physical and mathematical essentials of electrody-systematic introduction to those basic concepts of elec- namics are logically developed and critically discussed fortromagnetism that are fundamental in the study of elec- the purpose of application to engineering problems. Alltromagnetic waves, antennas, electromagnetic horns, wave concepts are introduced in their most general form, andguides, and ultra-high-frequency and microwave circuits. are defined systematically.

TEXTBOOK OF HEALTHFUL LIVING. New third editionBy HARom S. DIEHL, M.D., University of Minnesota. 708 pages, 54 x 84. $2.50

Winning widespread recognition as one of the leadingtextbooks in its field, this authoritative, readable, andpractical guide to healthful living has again been re-vised to include scientific developments in the fields ofnutrition, itamins, physical fitness, immunity, the mili-

tary control of insect-borne diseases, normal sex life, etc.The new edition includes material on mental health,heredity, narcotics, drug addiction, care of the skin, andmedical services. A glossary of technical terms has beenadded.

Send for copies on approval

McGRAW-HILL BOOK COMPANY, Inc.33& West 42nd Street, New York 18, N. Y. Aidwych House, London, W.C. 2

JUNE 15, 1945 SCIENCE ADVERTISEMENTS 11

Page 4: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

12 SCIENCE-ADVERTISEMENTS

7;keLi i *Q.o

MAINSPRINGS OF CIVILIZATION .By ELLSWORTH HUNTINGTON, Research Associate, Yale University

The three parts of this book take up first the general problem of evolution from geological timesdown to the present, with special emphasis on the stages preparing the way for the developmentof civilization. Part two deals with heredity, and discusses the selective action of migration,the problem of race, and role played by "kiths." .The final section takes up the denet of physi-cal environment on the evolution of civilization, emphasizing climate, diet and density of popu-lation as basic factors. Published in May.

660 Pages; 5% by 8%; $4.75

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

The only book that gives a full-scale account of the evolution of American scientific organiza-tions, this volume covers two and a half centuries of local, state and national societies, as wellas specialized branches from astronomy to zoology. Of timely interest is the picture of themobilization of science in the present war. Published in May.

246 pages; 5% by 8%; $.50

DYNAMIC METEOROLOG)By J. HOLMBOE, Professor of MeG. FoRsYTHE, former InstructorLos Angeles

Starts from the fundamental principlesand hydrodynamics needed for the undvector algebra and a few simple operatisenting concepts of atmospheric motioxbasic knowledge of general physics and

PRINCIPLES OF FIREARMSI By CHARiLZS E. BALLEISEN

6teorology; W. GUSTIN, Instructor of Meteorology; andof Meteorology; all at the University of California at

s of physics and develops the tools of thermodynamicslerstanding of atmospheric processes. The methods ofions of vector calculus are used as most naturally repre-n. The book is self-contained and presupposes only acalculus. Published in May.

378 pages; 5% by 8%; $4.50

A comprehensive study of firearms, showing how to design and analyze guns in accordance withthe laws of physics. Not a catalogue or historical record, this book gives a thorough discussionof small arms, from an explanatory, rather than descriptive, viewpoint. The newest, methodsof testing firearms are given, including the use of electronic devices which now permit recordingof transient data. Earlier methods still in use are also described. Published in April.

146 pages; 5% by 8%; $2.50

ANALYSIS OF FOODSBy ANDREW L. WINTON and KATE BARBER WINTON

Methods described in this volume include not only those that have been tested and adopted inthe United States and other countries, but many that have been only recently developed in recog-nized laboratories. More than a thousand methods and modifications are included, and thepresentation is concise without omission of essential details. Published in April.

999 pages; 61/A by 82/1Z,; $12.00

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

W1;1-1-

a

12 SCIENCE-ADVERTISEMENTS .Voi,. 101 No. 2633

0

sum-~

.

Page 5: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

JUNE 15, 1945 SCIENCE-ADVERTISEMENTS

For the brief course

Successful BLAKISTON TEXTS

* Mc CORKLESurvey of Physical Science for College Students

Designed for a three hour year's course for freshmen. Laboratory experiments areprovided. A highly successful cultural course. By PAUL McConn:), PH.D., RhodeIsland College. 273 flius. $2.75

* WEBERTemperature Measurement and Control

It outlines an experimental study of methods giving theoretical principles necessaryfor appreciation, intelligent use and extension. By R. L. WBER, PH.D., Penna. StateCollege. 183 Illus. $4.00

* HOYTConcise Physics-2nd Edition

For those who want a short intensive training in fundamentals of physics. Applica-tions in engineering field. Many problems included. By J. E. HoyT, PH.D., Assistedby C. A. BaRuLTHER, C.E., Drexel Evening School. 179 Illus. $2.50

* CULVERMusical Acoustics

An up-to-date survey of the physical basis of music. Demonstration exercises accom-pany the lectures and class discussions. By C. A. CuLvER, PH.D., Carleton College.128 Illus. $2.50

* MEREDITHThe Science of Health

Emphasis is given to such subjects as nutrition, physical training, parenthood, childwelfare, nervous disorders, mental hygiene and personality adjustment. By F. L.

MEREDIT, M.D. 138 Illus. $2.50

* GRAYLaboratory Directions for Comparative Vertebrate Anatomy

The principal animals considered are the shark, Necturus and the cat. Each organsystem is treated in a comparative manner. By I. E. GRAY, PH.D., Duke University.80 Pages. $1.00

* REESEOutlines of Economic Zoology-4th Edition

For a brief course in economic zoology and for collateral reading in the regular course,this book gives the student up-to-date facts of economic importance. By A. M. RFBS,Pi.D., West Virginia University. 191 Illus. $3.25

* HYLANDER & STANLEYPlants and Man

A semester survey course for students who want not only the fundamentals but thecultural and practical values also. By C. J. HYLANDER, PH.D. and 0. B. STANLAY,PH.D., Colgate University. 308 Illus. $3.00

THE BLAKISTON COMPANY Philadelphia 5, Pa.

13

MEMISMENUM1

Page 6: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

14SINEAVRIEETlO.11 o 63

* How quinine was saved from practical extinction.

* How this world remedy for malaria developedfrom the wild and fast-disoppearing SouthAmerican cinchona tree.

* How 60 years of patient trial and error resultedin one of the most skillful scientific cultures inthe tropics

* How two great tropical regions struggled to supplythe world with Nature's only provision for themost serious disease on earth.

Here is the dramatic history of cinchona from seedbed to harvesting absorbingly told by an authorityon tropical economic plants.Norman Taylor, the author, is editor of "The GardenDictionary" and Botanical editor of Webster's 'NewInternational Dictionary." Veteran of many scientificexpeditions, he was formerly an assistant curator atthe New York Botanical Garden and a curator at theBrooklyn Botanic Garden. At present he is Directorof the Cinchona Products Institute in New York.Peter Honig, Dutch scientist with years of experiencein the Netherlpnds Indies, has written the introduc-tion on agiiculture in the Indies.

GINCHONA

IN JAVABY NORMAN TAYLOR

,'s2-GREENBERG: PUBLISHER 400 MADISON AVENUE NEW YORK 17, N. Y.

It\

VOLUME XIVANNUAL REVIEW OF BIOCHEMISTRY

Editor: J. MURRAY LUCK

Published by Associate Editor: JAMES H. C. SMITHANNUAL RE IE SIN.Editorial Committee:

ANNUAL REVIEWS, INC. H.J LMQUISTD. R. HOAGLAND

June 15, 1945 H. A. SPOEHRC. L. A. SCHMIDT

"Every person interested in the nutrition of plants and animals and in the chemistry of the compounds they containwill need this volume for ready reference." (Soil Science, 1944)"This series of volumes has been growing In Importance and value with the years until now It constitutes the bestsource of information for biochemists aside from original papers on which the reviews are based." (Canadian Chem-istry and Process Industries, Vol. 28, No. 9, 1944)CONTENTS: Biological Oxidations and Reductions: C. A. Elvehjem and H. Lardy; Enzymes that Hydrolyze the Carbon-

Nitrogen Bond: Proteinases, Peptidases, and Amidases: D. M. Greenberg and T. Winnick; Nonproteolytic,Nonoxidative Enzymes: H. Lineweaver and E. F. Jansen; The Chemistry of the Carbohydrates: C. D. Hurd;Chemistry of the Lipids: H. E. Longenecker and B. F. Daubert; Chemistry of the Amino Acids and Pro-teins: J. Steinhardt; Chemistry of the Nucleic Acids and Nucleoproteins: J. M. Gulland, G. R. Barker, andD. 0. Jordan; X-Ray Studies on Compounds of Biochemical Interest: I. Fankuchen; Chemistry of theSteroids: W. L. RuighF Chemistry and Metabolism of the Compounds of Sulfur: J. H. W. Lugg; Chemistryand Metabolism of the Compounds of Phosphorus: H. M. Kalckar; Carbohydrate Metabolism: J. A. Russell;Fat Metabolism: E. F. Gildea and E. B. Man; Metabolism of Proteins and Amino Acids: P. P. Cohen;Chemistry of the Triterpenes: C. R. Noller; Mineral Metabolism: J. Sendroy, Jr.; Nutrition: F. J. Stare, D.M. Hegsted, and J. M. McKibben; Water-Soluble Vitamins: L. C. Norris and G. F. Heuser; Fat-SolubleVitamins: J. C. Fritz; Chemistry of the Hormones: W. T. Salter; Animal Pigments: H. F. Holden; Detoxi-cation Mechanisms: W. A. Perlzweig and P. Handler; Biochemistry of Malignant Tissue: J. P. Greenstein;Nitrogenous Constituents of Plants: J. G. Wood; Biological Nitrogen Fixation: R. H. Burris and P. W.Wilson; Mineral Nutrition of Plants: H. D. Chapman; Chemistry and Metabolism of Bacteria: J. H. Mueller;Chemistry of Antibiotic-Substances other than Penicillin: A. E. Oxford.

On Sale by

ANNUAL REVIEWS, INC.Approximately 885 pages A T $5.00 per copy (American Funds)Author and Subject Indexes Stanford Unlverslty P.O., Californa Postpaid In U.. A.

!I-

14 SCIENCE-ADVERTISEMENTS VOL. 101, NO. 2633.

Page 7: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

CEC-DETSMNS1

In a bomber a GUNNER uses a new gun-sight lamp that permits him to aim directlyinto the sun - blasting enemy planes thatotherwise would be invulnerable becauseof the blinding glare.

... the name on the GUNSIGHT LAMP is Westinghouse.

On a railroad an ENGINEER gets smootheroperation and 25So more power - from hissteam locomotive because of a revolutionarynew steam turbine drive.

... the name on the TURBINE DRIVE is JJestinghouse.

In an Army arsenal a BALLISTICS EXPERTphotographs projectiles, smashing througharmor plate, with an x-ray tube that takes a

picture in 1/1,000,000th of a second.

...-the name on the X-RAY TUBE is Westinghouse.

Mas-

Z W 000 ;0 .On a carrier a PLANE DIRECTOR uses

a new kind of elevator to hoist planes on deckfaster keeping the deck cleared and gettingfighters into the air quicker.

the name on the ELETITOR is fkestinghouse.

TODAY-Westinghouse skill in research and engineer-ing is constantly at work, developing new and better war

estnse materials for final Victory.PLANTS IN 25 CITIES OFfiCES EVERYWHERE TOMORROW-This same research and engineering skill

Tune in: JOHN CHARLES THOMAS will mean more dependable, more efficient industrial equip-Sun. 2.30 pm, EWT, NBC ment and appliances for the home.

15JUNE 15, 1945 SCIENCE-ADVERTISEMENTS

- --- r --- - -- - ' -- - -

Page 8: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

CON TROUnlimited preservation, with-out refrigeration, of highlyperishable serums, guinea-pigcomplement, penicillin, plasmaand other biologicals is pos-sible with Stokes Lyophile-Cryochem type of freeze-dryingequipment for desiccation fromthe frozen state.Stokes pioneered and commer-cially developed this method ofDrying by Sublimation* underhigh vacuum in conjunctionwith the University of Pennsyl-vania and Sharp and Dohme.It has been a key factor in thevast blood plasma program ...in the preservation of penicillin. . . and in accumulating serumsto control yellow fever, ty-phoid, measles, whoopingcough, etc. Even in the heartof darkest Africa, Stokes Lyo-phile - Cryochem equipment isused to combat the dread "rin-derpest." Over 275 Stokes unitsare now in use throughout theworld in hospitals, researchlaboratories, universities andcommercial plants.Stokes engineers and manufac-tures complete equipment for'the process, from test tube toplant-scale production. Facili-ties and authoritative assistanceare available for research, de-velopment and application ofdesiccation from the frozenstate. A complete pilot plantin the Stokes Laboratory is usedfor tests and demonstrations.Our technical staff invites yourconsultation.*Journal of Immunology, Vol. 50,No. 1, 1945.F. J. STOKES MACHINE CO.6056 Tabor Rd. Phila. 20, Pa.

L1 OF DISEASETHROUGH UNLIMITED PRESERVATION

OF LABILE BIOLOGICALS BY

(Above) Plant-scaleFreeze-Drying Cham-ber. (Right) Hospital

Apparatus.

~0o270

Page 9: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

JUNE 15, 1945 SCIENCE-ADVERTISEMENTS

CONSTANT TEMPERATUREEQUIPMENT

Backed by a

Quarter Century of Specialization

CONSTANT

TEMPERATURE

LABORATORY~~~~~BATHSFor water or oil, with

or without built-in re-

frigeration and/orshak-ing mechanism, for awide range of operat-ing temperatures whichcan be held as close as0.05' C.

Bulletin A-S-15

IMPROVEDFORCED-DRAFT

CONSTANT

TEMPERATURE

_ _ 1 ~~~~OVENSRange, room to 2O00

C. Constancy, ± 0.50 C.

Uniformity of tempera-ture throughout theworking chamber, ±0.25*C. Its unusually fine

performance merits yourinvestigation.

Bulletin A-2102

0

MANOMETRICAPPARATUS FOR

MICRO-RESPIRA-TION STUDIES

For methods of War-burg, Barcroft andothers. Temperaturerange, 100 to 50' C.Constancy, ± 0.050 C. or

r_ better. Embodies im-proved features sug-gested by leading re-search workers.

Bulletin A-80-35

IN 'THE MARKET PLACERates to be paid in advance: 10 cents a word, minimum

$2.00; no discounts or agency commissions. Count eightwords if a box address is to be used. Copy should be sentto the Advertising Department, American Association forthe Advancement of Science, Smithsonian Institution Build-ing, Washington 25, D. C.

PERIODICALSWanted to purchase Scientific Periodicals, For-eign-Domestic. WALTER J. JOHNSON, 125East 23rd Street, New York 10, New York.For Sale: Medical, Chemical, and 8osentific Peri-odicals. Bets, volumes, copies. B. LOGIN ANDSON, INC. Established 1887, 29 East 21st St.,New York 10.

POSITIONS OPEN AND WANTEDResearch Biochemist, having background in or-ganic and physical chemistry, needed for researchin enzyme studies. Recent Ph.D preferred. In-teresting work. Good salary. Excellent oppor-tunity. In New York City. Please detail yourqualifications, availability and include recent snap-shot with reply. Box 142, " ScIENCE" SmithsonianInstitution Building, Washington 25, D. C.Excellent opening with company located in NewYork City. Research man to develop new tech-niques for the Electron Microscope. An individualwith imagination can make a name for himself ina new field. A Ph.D. in Physics, Physical Chem-istry or Biophysics, or equivalent by experience,with a background which will enable him to antici-pate important future applications of this new re-search tool. Box 162 "SciiENCr,2" SmithsonianInstitution Building, Washington 25, D. C.Biochemist for research on quantitative incidenceof certain enzymes in the brain. Salary $2500less government reductions. Write W. AsHBY,Saint Elizabeths Hospital, Washington.Biologist, Zoologist. Undergraduate and threeyears of graduate work all at leading universities.Nineteen years of College teaching, mostly Zool-ogy, Heredity, and Physiology in western stateuniversity. Publications. Stress personal rela-tionship to students. Protestant. Prefer to locatein South. Box 164, "SCIENCE, " Smithsonian In-stitution Building, Washington 25, D. C.Opportunities wanted. Parasitologist is available;B.S., M.S., Ph.D. degrees state university (Majors:Zoology and Bacteriology); past several years, as-sistant professor of parasitology, state university;age twenty-eight; ineligible military service be-cause of non-incapacitating physical disabilities;recommended as excellent research man, possessingsplendid aptitude in organization and directingresearch projects; for further information pleasewrite BURNEICE LARSON, Director, Medical Bureau,Palmolive Building, Chicago 11.

SUPPTLES

Write for New Cat. No. 67 onAnalytical Filter Papers

Schleicher & Schuell Co.Plant and Lab: South Le, Mass.

Head Office: 116-118 West 14th St.New York 11, N. Y.

17

Other Aminco Constant TemperatureEquipment, Including:

LoLag Electric Heaters and ControlsSensitive, Reliable Thermoregulators

Supersensitive Belays-Motor-driven Stirrers and Pumps, Etc.Fully Described in Catalog A41

11m ----WIL

Page 10: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

18 SCIENCE-ADVERTISEMENTS

Pioneering Uses of Fiberglas* Materials in MedicineThis new booklet describes a few ofthe uses of Fiberglas in medicine.Some of the uses are still in the ex-perimental stage and require furtherdevelopment. Others are now helpingphysicians and surgeons obtain im-proved results in treating the sickor wounded. Such uses include:Measurement of Nitrogen Loss inExudate from Burned Skin

Tracer Threads in Surgical SpongesExperimental Surgical SuturesCulture of MicroorganismsBlood Plasma FiltersAir-Borne Bacteria ControlPollen and Dust ControlPenicillin ProductionInsulationofAutoclavableClosedMotorFiberglas-Plastic Artificial Limbs

Fiberglas is glass in fiber or fila-ment form. It is twisted into yarn,then woven into many types of tex-tiles. A number of physical proper-ties not often found in combinationare responsible for the contributionFiberglas has been able to make inthe fields of research bearing onhealth.Fiberglas is an inorganic, non-

toxic, nonallergenic, nonsensitizingand chemically stable substancewhich produces no harmful effectupon human tissue. It is pliable, hasgreat tensile strength, high dimen-sional stability and resistance to high

temperatures, steam, corrosive fumesand acids (except hydrofluoric) andcan be sterilized and resterilized. Theindividual fibers are nonhygroscopicand noninflammable.Owens-Corning Fiberglas Corpora-

tion will produce and supply Fiber-glas materials required for medicalresearch and necessary to clinical in-vestigation, regardless of the smallquantities that may be involved.

In writing for your copy of the newbooklet and Fiberglas sample cardaddress: Owens-Corning FiberglasCorporation, 2033 Nicholas Bldg.,Toledo 1, Ohio.

FIBERGLAS*T.M. Reg. U.S. Pat. Off.

is SCIENCE-ADVERTISEMENTS VOL. 101, No. 2633

Page 11: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

JJE1,14 SCEC -AV TIE NS 19

N_ _ A55 , I

S., l |I i ~~. _ _.

FS All-Glass Stirrer

Holds vacuum or-pressure without mercury sealDifferences as great as 6Omm between Insideand outside of flask cause no leakage.

Apparatus, as supplied, consists of bearingand shaft precisely fitted to each other.Recommended for all types of chemical work,

particularly for organic and electro-chemicalresearch, since no problem of chemical effectof the stirrer or its seal arises. The reactionmixture is in contact with glass only.At all leading Laboratory Supply Dealers.

Bulletin S-299 upon requestFISH-SCHURMAN CORPORATION

230 East 45th Street, New York 17, N. Y.

Fish-Sch ii rrnu

S

Inorganic andOrganic Chemicals

Biological StainsSolutions

Chemical IndicatorsTest Papers

WRITE FOR COPY OF OUR LATEST CATALOG

The COLEMAN & BELL Co., Manufacturing Chemists: Norwood, 0., U. S. A.

txiwu.~ TA

Photoelectricwith p11 Determination

with

LUMETRON Colorimeter Mod. 400* Highly accurate pH measurements* Covering the complete pH range* Applieable to a great variety of pH problem

While serving as pH meter, LUMETBON MOD.400 is equally suited for all colorimetrie and turbid-imetrie tests in chemical analysis. Price $130.o95 madisonAve. PHOTOVOLT CORP. NewYork16,N.Y.Trite for literature on Photoelectric pH Determination.

19.JUNEC 15, 1945 SCIENCE-ADVERTISEMENTS

Page 12: JUNE, 15, 1945€¦ · I-Fundamentals By RONOLD W. P. KING, Harvard University. Radio Communication Series. 575 pages, 51 x 8i. $6.00 The first of a series of three volumes, this

20 .GIENGE-ADVERTISEMENTS

ANNOUNCEMENT

WtE are proud to announce that the Spencer LensCompany will operate under the name of its

parent company after June 30, 1945.

Please change your records to show our new name:

AMERICAN OPTICAL COMPANYScientific Instrument Division

Buffalo 11, New York

The name SPENCER, as in the past, will be a hallmarkappearing only on the finest scientific instruments.

Since 1935, when the Spencer Lens Company waspurchased by the American Optical Company, facili-ties for research and manufacturing have been greatlyincreased.

The change ot name and closer integration with theAmerican Optical Company, the largest producer ofophthalmic products in the world, will provide newopportunities to improve products and render- betterservice.

Spencer Lens CompanyBUFFALO 11, NEW YORK

Scientific Instrument Division ofAMERICAN OPTICAL COMPANY

VOL. lolp No. 263320 SCIENCE-ADVERTISEMENTS