SCIENCE-ADVERTISEMENTS 11

Just Ready The New Second _Edition of

WERTHElM'SIOrganic Chemistryi

By E. WERTHEIM, PH.D.Professor of Organic Chemistry

University of Arkansas

In this new text, the presentation is such that initial learning is easy and facts are easily foundagain when wanted. The object of the book is to teach a certain amount of organic chemistryand teach it well. Students depend on the text for much of their instruction, hence everyeffort has been made to meet and improve this situation.

Teachers and students will like the new colored plates of MOLECULAR MODELS OF OR-GANIC SUBSTANCES in this edition, also the up-to-date treatment of such modern subjectsas Electronic Structures and Formulas, Acrylics, Butadiene, Explosives, Nylon, Octane rat-ings, Plastics, Synthetic Rubber, Sulfa Drugs, Vitamins, etc.

Excellent teaching devices are the new, stimulating review questions, numerical problems andup-to-the-minute literature references. These will facilitate student reports and class discus-sions in courses which allow this treatment.

The tables of derivations of organic compounds, glossary, flow sheets of industrial processes,chronological table of organic chemistry developments, charts and summaries, will give thestudent considerable help both in learning and in review.

The book presents material for a year's course for beginning students-those who will major-in chemistry or specialize in organic chemistry and for those enrolled in premedical or chemicalengineering courses.

With text figures, colored plates, many portraits, industrial flow sheets, tables, reviewquestions, summaries, numerical problems, historical data, bibliographies, charts andappendix of useful data.

867 Pages. $4.00. May 1945

Laboratory Guide For Organic Chemistry-2nd EditionThis manual by Dr. Wertheim provides 169 varied experiments illustrating properties, methodsof preparation, reactions of organic compounds, and a section on "spot tests." Many helpfuldrawings are included, and a time table for each experiment is given as a guide to the student.

24 Illus. 560 Pages. $2.00

THE BLAKISTON COMPANY Philadelphia 5, Pa.

MAY 4, 1945

SCIENCE-SUPPLEMENT

SCIENCE NEWSScience Service, Washington, D. C.

GASOLINE AND DIESEL OIL OBTAINEDFROM NATURAL GAS

GASOLINE and other liquid hydrocarbons may be madefrom natural gas at a manufacturing cost, for the gaso-line, of approximately five cents a gallon, by the so-calledSynthol process, according to a statement made by PaulRyan, of the M. W. Kellogg Company of Jersey City, N.J., in which he described the various technical steps of theprocess. The natural gas, he states, costs about five centsa thousand cubic feet. Diesel fuel and various chemicalcompounds are obtained at the same time.

Seven major steps are involved in the process. Theyare purification, synthesis gas preparation, synthesis reac-tion, condensation, gas separation, stabilization and frac-tionation of the liquid hydrocarbon products into gasolineand diesel oil, and the separation and recovery of theliquid chemical compounds.

Sulfur and other deleterious compounds are removed inthe purification, the natural gas is converted to carbonmonoxide and hydrogen in the synthesis gas preparationstep, and in the next step these are converted, in the pres-ence of a selected catalyst under controlled conditions,into the desired hydrocarbons and chemical compounds.

These must be condensed into liquid form in condens-ers, and in the gas separator the oil layer containing theliquid hydrocarbons is removed from the water layer con-taining the chemical compounds. The various liquid hy-drocarboirs are stabilized and fractionated into gasolineand diesel oil in the last step in the process.The plant to make the liquid hydrocarbons from natural

gas should be near large gas reserves because approxi-mately 11,000 cubic feet of gas are required to produceone barrel of liquid hydrocarbons. He stated that theSynthol process of the Kellogg Company presents for someoil companies "interesting postwar possibilities for theeconomic and profitable development of new uses for anold natural resource.y"

ITEMSEVERY one who saw the big meteor flash across the sky

on the evening of April 19 is asked to report what theysaw so that astronomers can determine how large the fire-ball was and where the fragments, if it fell to earth, canprobably be found. Reports should be sent to Dr. CharlesP. Olivier, president of the American Meteor Society,Flower Observatory, Upper Darby, Pa. Each reportshould tell from where the person saw it, where in thesky the meteor was first seen and last seen, stating howhigh in the sky and direction, so that its altitude andazimuth or bearing can be calculated. Information onthe meteor's train or smoke trail is particularly desired,especially its shape, changes which occurred, and whichway it drifted. If any sound was heard which mighthave come from the meteor, please also report that.

AFTrnn seeing the miracle which has been performed byAmerican industry during- this war, South Americanyoung men are turning to the United States rather than

Europe for engineering education, according to AnibalSantos, formerly mechanical engineer of Empresa Elec-trich del Ecuador, Inc., Guayaquil, Ecuador, and nowassociated with the Combustion Engineering Company,speaking before the American Society of Mechanical En-gineers. Only recently have South Americans begun tostudy engineering in North America. The problems facedby American engineers in Latin America are complicatedby the fact that there are relatively few technical menthere, as compared with the legal and medical professions.

A NEW aluminum lifeboat that weighs less than a woodboat and only half the weight of a steel boat of the samecapacity has been approved by the U. S. Coast Guard foruse on American merchant ships. 'It is resistant to actionof such corrosive agents as salt spray, and because of itslightness reduces the weight installed on the upper decks,thereby improving the stability of the ship. Lighter-weight davits may be employed to handle the aluminumboat than those required for a steel or wood boat of thesame capacity, since when loaded with the same sea rescueequipment, it weighs less than two and one-half tons.Most standard lifeboats weigh more. The equipmentcarried includes oars, seats for a large number of men,an axe, provisions for sustaining survivors until they areTescued, and may have an inboard motor.

ALTERNATING current electric motors of small size buttremendous strength which perform heavy-duty controljobs aboard aircraft, such as pumping fuel and air, operat-ing propeller-feathering and wheel-retracting mechanisms,were described here to-day by Ray G. Holt, of Pesco Prod-ucts Co., Cleveland, at a meeting of the Society of Auto-motive Engineers. The motors he referred to are three-phase 400-cyele 208-volt. Power packages consisting ofsmall electric motors and attached mechanisms, some of"flea power" size and only an inch in diameter, havebeen made available for use both with electric and hy-draulic aircraft control systems. The power packagesare located near the devices they provide the power tooperate and help to solve the serious engineering problemof transmitting great power over long distances in mili-tary aircraft.

THAT the first section of the Society of AutomotiveEngineers to be organized outside continental NorthAmerica has been established in the Hawaiian Islands,has been reported by John A. C. Warner, general managerof the society. The Hawaiian section will be comprisedof automotive engineers on Oahu and neighboring islandsand active professionally in an area regarded as an im-portant Pacific route junction of postwar air travel. TheSociety of Automotive Engineers was organized in 1905to represent the interests of all automotive engineers.The activities encompass design, production and operationof vehicles and aircraft in peacetime, and in wartime thedevelopmental research needed for military materiel pro-duced by the automotive industry.

12 VOL. 101, NO. 2627

NEW HELP FOR RESEARCH ON MOLDS

74 aed Eafte:Manual of the ASPERGILLI

By Charles Thom, Collaborator, Northern Regional Research Laboratory. Formerly PrincipalMycologist, Bureau of Plant Industry, U. S. Department of Agriculture, Washington, D. C.; andKenneth B. Raper, Senior Microbiologist, Fermentation Division, Northern Regional ResearchLaboratory, Bureau of Agricultural and Industrial Chemistry, U. S. Department of Agriculture,Peoria, Illinois. First edition, 1945, 382 pages, 76 illustrations, 7 color plates, $7.00.Naturally the discovery of penicillin and its marvelous healing virtues has brought about a greatlyincreased interest in molds of all kinds, and many demands for fundamental information concern-ing them, to be used as the basis for further research as to their possibilities, particularly in thedevelopment of other substances for medical, agricultural or industrial use. Dr. Thom, whosebook on The Aspergilli we published in 1926 and his book on The Penicillia in 1930 (now both outof print), has been an international authority on molds for forty years.The Aspergilli have become increasingly important as responsible agents in a number of industrialfermentations. Many of them are being found capable of producing antibiotic substances andtheir possible use in this field will undoubtedly be exhaustively explored. For these reasons theneed for a manual for those who wish to identify Aspergilli under observation, without regard tothe historical aspects of the group, has become increasingly apparent. This new manual willprove as continually valuable and essential to research workers as is Bergey 's Manual of Determi-native Bacteriology. The seven beautiful natural color plates (42 figures) add greatly to thevalue of the volume. This new volume is not a monograph but a reference manual serving twopurposes: (1) to provide the worker encountering an Aspergillus with means for its identification,and hence to open to him the whole literature of the group as well as the particular species; and(2) by enumerating all forms found in the literature, and indicating their proper allocation, to-guide the user of that literature in the interpretation of names found in his reading but not knownto him in nature, in culture, or in exsiccati.The manual is based upon comparative study of thousands of strains of Aspergilli in culture.Representative strains, giving the range of morphology and biochemical activity in each speciesare maintained in the permanent collection of the Northern Regional Research Laboratory. Thescope and comprehensiveness of the work can be seen from the following list of the twenty-fivechapters:

The Aspergillus flavipes GroupPART I. GENERAL DISCUSSION The Aspergillus versicolor Group

Historical Introduction The Aspergillus terreus GroupClassification, Generic Diagnosis, and Synonymy The Aspergillus candidus GroupMorphology and Description The Aspergillis niger GroupCultivation and Examination The Aspergillus wentii GroupPreservation of Cultures The Aspergillus tamarii GroupVariation The Aspergillus flavus-oryzae Group

The Aspergillus ochraceus GroupPART II. THE MANUAL PROPER PR I.RFRNEMTRA- ~~~~~PARTIII. REFERENCE MATERIAL

The Use of the ManualThe Aspergillus clavatus Group Topncal BibliographyThe Aspergillus glaucus Group General BibliographyThe Aspergillus fumigatus Group Check List of Species and GeneraThe Aspergillus nidulans Group Accepted Species, Varieties, and MutationsThe Aspergillus ustus Group INDEX

.

The Williams & Wilkins Company,Mt. Royal & Guilford Avenues, Baltimore 2, Md.Please send Thom & Raper: Manual of the Aspergilli, $7.00.

Signature .........Address ....................................................................................................................................................................................................................

MAY 4, 1945 SCIENCE-ADVERTISEMENTS is

14 SCIENCE-ADVERTISEMENTS VOL. 101, No. 2627

7/he OcXc/ ,'cQ$u-cAd LWaA

THE CHEMICAL PROCESS INDUSTRIESBy R. NORRIS SHREVE

Professor of Chemical Engineering, Purdue University

Chemical Engineering Series

957 pages, 51 x 84. Textbook edition, $6.00

Present-day teaching trends in chemical engineering are reflected in this important new book.Offering a definitely original approach, the author follows modern factory practice in breakingdown the actual industrial procedures into unit operations and unit processes, not only in the flowsheets, but in the supplementary text as well. Unit chemical processes and unit physical opera-tions are closely integrated.

INTRODUCTION TO INDUSTRIAL CHEMISTRYBy W. T. FRIER and ALBERT C. HOLLER

General Electric Company United States Metal Products Company

In press-ready in June

In this forthcoming book two industrial chemists provide an exceptionally clear and interestingelementary text, especially suitable for use in training classes within industry, and, in general,with students of limited scientific background. The first third of the book covers fundamentalchemical principles, and the other two thirds deal with representative industrial applications.Constant reference is made to familiar everyday phenomena.

TEXTBOOK OF HEALTHFUL LIVINGNew Third Edition

By HAROLD S. DIEHL, M.D.Professor of Preventive Medicine and Dean of the Medical Sciences,

University of Minnesota

708 pages, 54 x 84. $2.50

The author of this well known practical guide to healthful living has again revised the text to in-clude recent scientific developments in the fields of nutrition, vitamins, physical fitness, immunity,the military control of insect-borne diseases, etc. All statistics have been brought up to date.New material has been added on mental health, heredity, narcotics, drug addiction, care of theskin, and medical services.

Send for copies on approval

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

14 SCIENCE-ADVERTISEMENTS VOL. 101, No. 2627

Aldwych House, London, W.C.2.

MA 4,195SINEA VRISMNS

"This elementary text will doubtless enjoy a deservedpopularity since it appears to fill a long felt need. Itcovers the subject matter indicated by the title in a simple,logical, lucid manner.

BULLETIN OF JOHNS HOPKINS HOSPITAL

ARNOW-REITZ

ORGANICand BIOLOGICAL

CHEMISTRYby L. EARLE ARNOW, Ph.D.,M.D., Director of BiochemicalResearch, Sharp and Dohme,Glenolden, Pa.; and HENRYC. REITZ, Ph.D., Ass't Chem-ist to the Western RegionalResearch Laboratory, U. S.Dep't of Agriculture, Albany,California.

736 pages, 91 illustrations.$4.25

Part I reviews chemical fundamentals for the stu-dent. Part II deals with the subject matter oforganic chemistry, and is prefaced with sugges-tions of technics and methods for successful study.Every effort is made to relate the study to theeveryday life of the student. Plastics, syntheticrubber, textile fibers and other topics of timelyinterest are covered.

Part III is a summary of the more importantphases of metabolism and nutrition. The diges-tion, intermediary metabolism and excretion ofeach of the major types of biological compoundshave been treated as a unit. Selected referencesare intluded at the end of each chapter.

The C. V. Mosby Company3207 Washington Blvd.St. Louis 3, Missouri

Sdi. 5/45

Gentlemen: Send me Arnow-Reitz' INTRODUCTION TO ORGANIC AND BIO-

LOGICAL CHEMISTRY, price $4.25

D Attached is my check. LI Charge my account.

Name ..............................................................................

Address .........

MAY 4, 1945 SCIENCE-ADVERTISEMENTS 15-

.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

sS WV

May

1945

660 Pages5 by 8%

$4.75

MAINSPRINGS

OF

CIVI LIZATIONBy ELLSWORTH HUNTINGTON

Research Associate in Geography, Yalor *versity

In a stimulating and thought-provoking studyof the influence of geography, heredity and cul-,ture on man, Dr. Huntington traces in his latestbook the factors that have helped to develop ourpresent-day civilization. The vital roles bio-logical inheritance and physical environmenthave played in determining man's destiny, andthe importance of geography and climate in in-fluencing the development of human culture arediscussed in detail in this authoritative book.

The scope of MAINSPRINGS OF CIVILIZA-TION is indeed vast. In the first of its threesections the book deals with the general prob-lem of evolution from geological times down to,'the present, with special emphasis oni the stageswhich prepared the way for the development ofcivilization. Part Two takes up the problems,of heredity, discussing the selective action of,migration, the problem of race, etc. The finalsection deals at great length with the effect:of physical environment upon the evolution of'civilization. Climate, diet, and density of popu-lation are emphasized as basic factors.

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

CONTENTSPart I-THE BACKGROUND OFCIVILIZATION * The SupremeFact * The Background of Civili-zation.Part II-HEREDITY * The Prob-lem of Race * The Instability ofRaces * Migration and HumanQuality * The Puritans as a TestCase * Character and Inheritanoe* The Interplay of Culture andHeredity * Evolution of DivergentTypes 0 The Selective Process inHistory S Junkers and Nazis.Part III-PHYSICAL ENVI-RONMENT AND HUMAN AC-TIVITY * The Geographic Pat-tern of Civilization * Health andNational Character 0 Human Ac-tivity and Temperature * SocialConditions, Religion and Climate aThe Seasons * Weather and Storms* Regions and Seasons of MentalActivity * Psychological Reactionsto Weather * The Distribution ofCivilization Coldward and Storm-ward * -Diet and National Char-acter 0 Agriculture, Disease andDiet 0 Cycles, Rhythms, and Peri-odicities * Two Intriguing Cycles* Broader Aspects of Environ-mental Cycles * Historic Phases ofClimatic Cycles * Worldwide Cli-matic Cycles * Geographical Op-tima of Civilization * Ages ofDarkness and Revival * Bibliogra-phy * Index.

1'I

Is SCIENCE-ADVERTISEMENTS VOL. 101, NO'. 2627

k%

"l.4.,"*% 'I,S.

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SCIENCE-ADVERTISEMENTS 17

THE EARTH AND MANBy D. H. DAVIS

"A fascinating presentation of the subject that is worth the at-tention of every geography teacher. "-Amer. Geographical So-ciety of N. Y. "The best book available in its field.'"-Annalsof the Amer. Academy of Political & Social Science. "A veritablemine of geographical knowledge . . . judiciously selected andpainstakingly authenticated. . . . An excellent book in everyway. "-Economic Geography. Covers both physical and eco-nomic geography. For the introductory course in geography onthe college level. $4.25

ECOLOGICAL CROP GEOGRAPHYBy KARL H. W. KLAGES

"We heartily recommend this book to entomologists and others-who are interested in the phase of plant ecology which has to dowith crop plants. "-Annals of the Entomological Society ofAmerica. "Ecologists will be grateful for the writing and pub-lication of this book.'"-Ecology. "A decided contribution_should prove of inestimable worth to students, teachers, and spe-cialists having to do with long range agricultural policy."-Rural Sociology. For courses in crop production and crop ecol-ogy. $4.50

NATURE AND PROPERTIES OF SOILSBy LYON and BUCKMAN

-"Valuable, timely, and up-to-date. '-Jl. of the Anter. Society ofAgronomy. "Valuable from every point of view . . . will con-tinue to ifil a much felt want for those in the many diverse fieldsof agriculture, biology, and geology. "-Quarterly Review ofBiology. Widely used in agricultural colleges as the regularprerequisite for all courses in crops and plant science. 4th Ed.,$3.50

GEOMORPHOLOGY: Systematic and RegionalBy 0. D. VON ENGELN

"An outstanding contribution to one of the fields of geomorphicinvestigation of most practical present importance. "-Jl. ofGeomorphology. "One of the most valuable and timely contri.butions to the field of 'geoscience' that has come from the Ameri-can press these many decades. . . . Sure to take first place amongthe American textbooks on geomorphology, and to hold that placefor many years.' -Economic Geography. Gives the thoroughbasic training in geomorphology necessary for all kinds of geo-logic, survey and map work. $4.50

74 Wt4CIPdt4%e..,. 60 74odvete 4 11

MAY 4, 1945

18 A3CIENCE-ADVERTISEMENT8 VOL. 101, No. 2627

Exposure Determinationin Photomicrography

by direct light measurement in plane of image

PHOTOVOLT Electronic Photometer MOD. 512,Also suitable for spectrophotometry, densitometryof spectrographs and X-ray difftraction' negatives,measurement of luminescence and fiuoresceceultraviolet radiation and absorption.

Now available with inecangeable searc unit., forinfra-red, visible, ultraviolet as far as 200 milflmicrons.

Write for literature

PHOTOVOLT CORP.95 Madfison Ave. New York 18, N. Y.

¢Wratten Light Filters"Seventeenth Edition, Revised

S INCE 1909, Wratten Light Filters have beenrecognized as occupying a unique position in

photographic, technical, and scientific work. Care-fully prepared and standardized under rigid lab-oratory conditions, each Wratten Filter has beendesigned to meet a specific need.The latest revised edition of the well-known

book on this subject gives information on filtersfor commercial and scientific uses, including spec-tral transmission curves and tables for more than100 filters, and other useful information. Trans-mission data for several new filters are included.

Copies of the book are obtainable from dealersin photographic supplies. Price, 50 cents.

EASTMAN KODAK COMPANY

CATALOGUE NO. 16HISTORY

ofSCIENCE AND MEDICINE

Through the CenturiesA Fine Collection of 400 Books and Manuscriptson the History of Science and Medicine from

the Twelfth Century to the Present.Copy of this Cataloguewill be sent on Request.

WALTER J. JOHNSON125 East 23rd St.New Yorko10, N. Y.

GUMS JWATER-SOLU BLE

ACACIA KARAYALOCUST TRAGACANTH

S. B. PENICK & COMPANY50 Church Street, New York 7, N. Y.

735 W. Division St., Chicago 10,11l.

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IS SCIENCE-ADVERTISEMENTS VOL. 101, NO. 2627

Research Laboratories Rochester 4, N. Y.

in

I N T H E M A R K E T PL A C ERates to be paid in advance: 10 cents a word, minimum $2.00; no discounts or agency commissions. Count eight words if a

box address is to be used. Copy should be sent to the Advertising Department, American Association for the Advancement ofScience, Smithsonian Institution Building, Washington 25, D. C.

POSITIONS OPENSCIENTIFIC INSTRUMENT AND LABORA-

TORY APPARATUS PERSONNELSeveral permanent positions'with a promising postwar future now available with one of the leadingmanufacturers and distributors located in the mid-west.(1) Sales Engineers: Several territories centeringchiefly in larger cities and educational centers.Consists largely of contact work with universities,research and industrial laboratories. Sales experi-ence not essential as adequate training will be given.(2) Inside Positions: e.g., Technical Correspon-dents; purchasing; quotations and junior executive.Actual experience i the laboratory supply businessdesirable but not essential.Please give brief description of yourself; qualifi-cations and initial remuneration expected. Box147, " SCIENCE," Smithsonian Institution Building,Washington 25, D. C.

Research 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 your

qualifications, availability and include recent snap-

shot with reply. Box 142, " SCIENCE, " SmithsonianInstitution Building, Washington 25, D. C.

Medical Publisher desires college graduate with a

knowledge of the biological sciences for travelingposition contacting teachers in educational institu-tions. Teaching experience will be useful. Dis-charged veteran given preference. Good salaryand all traveling expenses paid. Excellent oppor-

tunity for right man. Give full description ofprevious experience. Write Educational Dept., W.B. SAUNDERS COMPANY, Philadelphia 5, Pa.

BOOKS AND PERIODICALSWanted to purchase Scientific Periodicals, For-eign-Domestic. WALTER J. JOHNSON, 125East 23rd Street, New York 10, New York.

SUPPLIES

Pads of Special Paper forDrying Microscope Slides

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

Head Office: 116-118 West 14th

New York 11, Y.

We still have considerable stock of Gruebler Stainsand Kahlbaum Chemicals. Write for quotations.AKATOS, INC., 55 Van Dam St., New York 13, N. Y.For Sale: 1 large Bausch and Lomb Spectrometer,complete with camera attachment, in new condi-tion. $900.00; 1 Bausch and Lomb CentrifugeMicroscope, complete, in new condition. $300.00.SPINDLER AND SAUPPE, 2201 Beverly Boulevard, LosAngeles 4, California.

POSITIONS WANTEDPharmacologist, Ph.D., M.D., Experience: teach-ing, research in academic and pharmaceutical fields.Midwest preferred. 4A. Box 138, "ScIENCE,"Smithsonian Institution Building, Washington 25,D. C.

Botanist, Biologist. M.S. horticulture; Ph.D. plantphysiology from large university; 10 years collegeteaching experience. Desires better position teach-ing and research, preferably western college or uni-versity. Box 144, "ScIENCE," Smithsonian Insti-tution Building, Washington 25, D. C.

Pharmaceutical-Biochemist, M.Sc., 10 years experi-ence. Bacteriologist. Seeks essential position inpharmaceutical, biochemical, food work. Excellentrecord. Age 32, Draft 2-A. Can obtain release.Metropolitan New York or New Jersey area pre-ferred. Box 146, "SCIENCE," Smithsonian Insti-tution Building, Washington 25, D. C.

Position Wanted: Laboratory technician. A.B. inChemistry. In work on M.A. Specialized Bac-teriology. Box 128, Wesleyan College, Macon,Georgia.

Physiologist, Ph.D., Age 35. Extensive Researchand teaching experience in cellular and mammalianphysiology. Taught 7 years in large Eastern Medi-cal School. Three years war research, various as-pects human physiology; 2 years director of a WarDepartment laboratory. Available July 1 for re-sponsible position in Medical School, University orResearch Institution. Box 143, "SCIENCE," Smith-sonian Institution Building, Washington 25, D. C.

Psychophysiologist, Ph.D., psychology, age 42,many years research experience in psychophysio-logical optics, last 2 years teaching Associate inPhysics Department of large eastern University,European background. Wishes position with op-portunity for research. Available September. Box151, "SCIENCE," Smithsonian Institution Building,Washington 25, D. C.

Geologist, 41, University professor, desires summerfield work in geology in the Northwest. 18 sum-mers field experience on Canadian Government Ge-ological Surveys engaged in economic geology andmapping. Available -from June 1st until Septem-ber 15th. Box 152, "SCIENCE," Smithsonian In-stitution Building, Washington 25, D. C.

Woman Zoologist, 30, Ph.D. Five years successfulteaching of college zoology and entomology. Re-search and publications on arthropod ecology;membership in scientific organizations. Prefersposition with more opportunity for research. Box148, " SCIENCE," Smithsonian Institution Building,Washington 25, D. C.

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WEAVING COMMUNICATION HIGKWAY&

BELL TELEPHONE LABORATORIES

brings together the efforts of 2000 specialists in telephone and radio communication.Their wartime work has produced more than 1000 projects for the Armed Forces, rang-ing from carrier telephone-systems, packaged for the battle-front, to the electrical gundirector which helped shoot down robots above the White Cliffs of Dover. In normaltimes, Bell Laboratories' work in the Bell System is to insure continuous improvement

and economies in telephone service.

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A11111A1

SCIENCE-ADVERTISIMENTS 21

There is no short course in glass blowing. You learn the long, hard way. For glassblowing is an art which requires special aptitude. In the past its secrets werehanded down from father to son. Even today there are whole families of glassblowers at Corning.

All of which explains how a war can affect a lamp shop. Men and women can betaught to operate automatic machines-even lathes-overnight. But you cannottrain a lamp shop craftsman in a day, a month or even a year.War has made severe inroads on our lamp shops where the hand fabrication of

laboratory glassware is performed. Well over twenty per cent of Corning's glassblowers are in military service. Few could be replaced.However, despite such handicaps, lamp shop output has actually increased sev-

eral fold. By working more shifts and longer hours, by adding new facilities anddevising new ways of speeding production as much as is possible on hand work,the demands of the Armed Forces and war industries are being met.

Soon, heavy war demands may ease. Then, will you no longer have to wait, andyour requests for special apparatus can be met promptly. And to all this work,Corning can bring the new skill, the new techniques and the advanced methods,war production has added to Corning Research in Glass.

"Pyrex," "Vycor" and "Corning" are registered trade-marks and indicate manufacture by

CORNING GLASS WORKS * CORNING, NEW YORK

BALANCED FOR ALL-AROUND USE

torts Minda 141OR4TR GLSS$W4R

MAY 4, 1945

22 ASOIENCE-ADVERTISEMJ3JNTS VOL. 101, No. 2627

Spencer Microicopets n use in an Armey Laboratory. Official Photo-Lowry Field*

The Greatest Health Crusade in HistoryHealth is the first prerequisite of a

soldier. Keeping him healthy is an es-sential ingredient of Victory.

Since World War I medical sciencehas crusaded relentlessly for greaterknowledge to insure better health. Thesuccess of this crusade is resulting in anarmy which is far healthier than any inhistory. Of equal importance is the factthat the nation behind our armed forcesis likewise one of the healthiest whichthe world has ever known.Today, as for over a century, Spencer

Microscopes are playing an importantrole in both medical progress and ap-

plied medical practice. Greatly increas-ed production facilities are in operationnight and day to meet the unprece-dented wartime needs for microscopes.

Spencer LENS COMPANYBUFFALO, NEW YORK

SCIENTIFIC INSTRUMENT- DIVISION OFAMERICAN OPTICAL COMPANY

*Thbi, of course, does not constituste an indorsement by the War Department or by any other Goverment Agency.

22 SCIENCE-ADVERTISEMENTS VOL. 101, No. 2627