general chemistry · 2005. 7. 21. · laboratory manual for general zoology bytracyi. storer 154...

SCIENCE-ADVERTISEMENTS

'29~4% Pad~ed.. McGRAW-HILL BOOKS.. 4I~ P1m =cRA .0*TImm's

GENERAL CHEMISTRYBy JOHN ARREND TIMm

Professor of Chemistry and Director of School of Science, Simmons CollegeInternational Chemical Series

691 pages, 53/4 x 834, 185 illustrations. $3.75"I must say that I am delighted with the book. Profes-sor Timm 's conversational style coupled with his abilityto introduce concepts by easy stages should go a long waytoward stimulating and easing the path of the student.Descriptive and theoretical materials are skilfully inter-woven and the treatment is refreshingly modern-andclear-throughout. Nor is it oversimplified."

Professor SIDNEY J. FRENCHColgate University

'It seems to me that the book is an excellent one. I amparticularly struck by its readability. The organic sec-tion at the end I have read with care, and it seems to methat just enough, and of the right things, is included fora book of this kind."

Professor H. G. LINDWALLNew York University

"I am very much attracted by it, especially the earlyimportant chapters, which are very much to the point. "

Professor G. H. BENHAMMacDonald College

"This book appears to be very well written and thor-oughly up to date. The illustrations are particularlygood, especially the photographs showing arrangements ofatoms in molecules before and after reactions take place.The various line drawings and tables show that much carehas gone into their preparation. They add a good dealto the value of the book."

Professor WILLIAM LICHT, Jn.University of Cincinnati

"I have examined this text very carefully and am mostenthusiastic about it. It seems to me that ProfessorTimm has succeeded in unfolding the field of chemistryin such a manner that no difficult principles are taken upuntil the student is fully prepared to understand andappreciate their importance."

Professor RoY B. DAVISThe University of the South

"I have looked the book over carefully and consider it aclear, thorough, and scholarly treatment of the field."

Professor R. W. GETCHELLIowa State Teachers College

STORER'S

GENERAL ZOOLOGYBY TRACY I. STORER

Professor of Zoology, University of California at DavisMcGraw-Hill Publications in the Zoological Sciences

798 pages, 53/4 x 83/4, 556 illustrations. $3.754'I have made a careful examination of this book andsincerely believe that it is the best textbook in generalzoology that I have seen. "

Professor H. W. CUREANQueen's University

"I have explored its pages and can say unhesitatinglythat no zoology text of recent years has caught my eye tothe extent that it has. I predict for it a very high place.among the outstanding textbooks in zoology."

Professor H. M. HARnIsIowa State College

"It is a very fine book, in the production of which boththe author and publisher may well be proud of theirachievement."

Professor HARoLD KIRBYUniversity of California

"Professor Storer should be congratulated on his successin setting forth the principles underlying animal biology,and yet.including a comprehensive, systematic survey ofthe animal kingdom within the confines of a singlevolume. "

0

Professor B. P. YOUNGCornell University

LABORATORY MANUAL FOR GENERAL ZOOLOGYBY TRACY I. STORER154 pages, $1.25

SUGGESTIONS FOR LABORATORY INSTRUCTORSBy TRAcY I. STORER

(Supplied gratis to users of the Laboratory Manual)Send for copies on approval

McGRAW-HILL -BOOK COMPANY, INC.330 West 42nd Street, New York 18, N. Y. Aldwych House, London, W.C.2.

February 8, 1946 9


OUTLINES OF PHYSICAL CHEMISTRYBy the late FREDERICK GETMAN. Revised by FARRINGTON DANIELS,

Professor of Chemistry, University of Wisconsin

One of the leading textbooks in physical chemistry, "Getman and Daniels" has been popular for manyyears because of its unified presentation, its ample illustrations, its large selection of graded problems,and its regular revisions to keep the material up to date.

This seventh edition offers a somewhat more advanced treatment, particularly in the first part of thebook, than did the preceding edition. Some of the general material on atomic structure has been movedfrom the end of the book to the first chapter. The chapter on phase diagrams has been considerablyexpanded. A different approach to thermodynamics is used; the material has been divided into threechapters, to facilitate understanding. The conventions for electrochemistry have been simplified. And,finally, many problems and worked-out examples to illustrate principles and calculations are included.

Note especially these important features: There is material on behavior of gases, phase diagrams, ki-netics of chemical reactions, thermodynamics, solutions, fractional distillation, and theory of electrolytes.Further, there have been condensations, in this edition, in the interest of logical presentation of electrol-ysis and polarization, electrolytes and equilibria, and derivations.

"Vastly improved and the changes made and the rearrangement of the subject matter will,no doubt, meet with general approval.... The author and the publishers are to be con-gratulated . . . with the successful completion of an outstanding, thoroughly teachableundergraduate text of physical chemistry.' 'i-H. S. VAN KLOOSTER, Rensselaer PolytechnicInstitute, in the Journal of Chemical Education.

Seventh edition. 1943. 691 pages. 166 illus. 6 by 9J. $3.75.

Laboratory Manual of Physical Chemistry . .By ALBERT W. DAVISON, Scientific Director, Owens-Corning Fiber-glas Corp., Newark, Ohio, HENRY S. VAN KLOOSTER, Professorof Physical Chemistry, Rensselaer Polytechnic Institute, and WALTERH. BAUER, Assistant Professor of Physical Chemistry, RensselaerPolytechnic Institute. Third Edition. 1941. 229 pages. 46 illus. 8i

by 10O. Paper. $S.50

PHYSICAL BIOCHEMISTRYBy HENRY B. BULL, Associate Professor of Biochemistry,

Medical School .of Northwestern University

A specialized treatment of the fundamentals of physical chemistry that considers only that material whichshould prove useful in the understanding of biochemical and biological problems.

"I think it is a very excellent book and summarises in a very adequate and understandablemanner a number of facts on physical chemistry which are related to biochemistry not givenin other books.' '-H. J. DEUEL, JR., The University of Southern California.

1943. 347 pages. IhUs. 5) by 8). $3.75.

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

m

10 Vol. 103, No. 2667


FOUNDATIONSOF BIOLOGYBy L. L. Woodruff

"I know of no better text for funda-mentals, for a cultural education, or asa stimulus for more study in the bio-logical sciences.''-W. R. Hunt in TheYale Journal of Biology and Medicine."Thoroughly recommended to all stu-dents and to all general readers. "-isis. 6th Ed.-$3.75

MANUAL OF BIOLOGY by G. A.Baitsell-designed especially as a com-panion volume to Woodruff's Founda-tions of Biology but can be used withany other standard text in biology.6th Ed.-$2.75

A TEXTBOOK OFGENERAL BOTANY

By Smith, Gilbert, Evans, Dugsar,Bryan and Allen

"Can be highly recommended to beused in a one semester or a year's coursein general botany.' '-Bios. "Can berecommended with confidence.'"'-Jl. ofthe N. Y. Botanical Garden. 4th Ed.-$4.00

BACTERIOLOGYBy Buchanan and Buchanan

"The authors have selected with greatdiscrimination and have succeeded ingleaning from a wealth of material awell-balanced and well-organized text. "

Practical Home Economics. 4th Ed.3.75

COLLEGE ZOOLOGYBy R. W. Hegner

Well known as the outstanding text inits field this general survey for studentswho will not take advanced work is herehappily combined with detailed instruc-tion sufficient for those who will. 5thEd.-$3.75LABORATORY DIRECTIONS INCOLLEGE ZOOLOGY by H. L.Bruner -corresponds with Hegner'sCollege Zoology but is sufficiently de-tailed and comprehensive for use withstandard texts other than Hegner's.3rd Ed.-$1.75

LABORATORYEXPLORATIONS INGENERAL ZOOLOGY

By K. A. Stiles"Laboratory Explorations in GeneralZoology is new, dynamic, adaptable,and thorough. It is good scientificallyand pedagogically.... The author doesnot merely talk about the scientific,method he really teaches it. It is notto be supposed nothing else is taughtbut the scientific method. The subjectmatter of the exercises includes well-chosen material from animal morphol-ogy, physiology, taxonomy, ecology,embryology, heredity, and evolution-all arranged to Telate to man. "-Bios.$2.90

February 8, 1946 11


PERSONNEL PLACEMENTA New Advertising Service of Science

In February, 1945, Science inaugurated a classified advertising section under the titleIn The Market Place to carry short notices about supplies, equipment, books, and positionsopen and wanted. Nearly a year has passed and the use which the readers have made ofthis section amply justifies its continuance. Now, in recognition of the growing need forone central location which can be used by all scientists and the universities and industrialorganizations for personnel matters, Science announces that it will begin a separateclassified section in the March 1, 1946 issue known as Personnel Placement. In The MarketPlace will continue as a companion section for announcing needs for and availability ofmaterials, supplies, and books. The rates for both sections will be the same, 10 cents aword, with a minimum of $2.00, cash with order.

Many scientists are now being demobilized from the armed forces. Coincident withthis, the colleges and universities, because of unprecedented enrollments, are facing anacute shortage of instructional personnel. Industry, too, has great need for scientificpersonnel for the development of new products. Science because of its wide circulationand wide coverage of all branches of scientific activity is a logical medium for publicizingnotices of positions open and wanted.

The March 1 issue of Science presents an excellent opportunity for starting this service,since the issue will be devoted largely to the meetings to be held in St. Louis, March 27-30.Scientists looking for positions and organizations planning to have representatives at themeetings to discuss personnel problems will find it particularly advantageous to publishnotices in this issue and those of March 8 and 1 5.

Notices which are scheduled to appear in all three issues may usethe following special box addresses in place of the usual one at theregular box charge bf 8 words:

For individuals: "Will be attending St. Louis meeting. Ar-range interview through Box .. , Science."

For organizations: "Representative will be in attendance at St.Louis meeting. Arrange interview throughBox., Science."

All orders and copy to be inserted in the first issue of Personnel Placement must reachthe Association's Advertising Department, Massachusetts and Nebraska Avenues, N. W.,Washington 16, D. C., not later than February 15, 1946.

-91 Ar

Ink AWL

12 Vol. 103, No. 2667

-v- -T-

04 1.6

A -.26. 104

KEY TO PHOTOGRAPHS. * AfEschdch coi L. Erthell typho C, . p sD. Kul pneumna * B. P omons pyocyaneus . F. Mycobactrium trlo

The numlshndicate mrograms of Streptomycin per cc- of agar.

rpimz phoi~raphsshow the inhibitory action of in con- URINARY TRACT INFECTIONSJntat w rtmyofnrepreetativ or lanils in vitro. duo t ane ,lasmeStreptm exhibits a wide range of an activity lye eMIsin tir and in uvivo against both gram-positive and gram-negativeorganisms Cih results do not necessarily para in vtiro SALMONELLA INFECTIONSactivity or therapeutic result inexal nimals.. d*ystmkIn human medie, Step ycin is especially interesting be. MENINGITIS

cause of its ag gram-negativee organismsT-s loflpw&w emo noteworthy. results to date have been, btaied in the infcc- .WOUND INFECTIONStions, listed At the right v .swnwm-eateeg.

M.ER Kc'cX;'hc. '* ARUItWAY,;N.J.

AJI:TIBACTERIAL ACTIVITY

oiS^0M STREPTS

- - -. 119 _. l 1.

-1 idi 0-a - ' i

1-P

SCIENCE-ADVERTISEMENTSV

II

"MICROFLEX"

The universal mirrorreflex laboratorycamera for micro andmacro work.

Available for earlydelivery.For full details write to:

Gamma Instrument Company, Inc.95 Madison Avenue,New York 16, N. Y.

NEWRADIOACTIVITY INSTRUMENTS

IMPULSE REGISTER Accurately registers upto sixty impulses per second, and will solveyour problems in high speed impulse ormechanical operation counting.Price FOB factory . $55.00

GEIGER MULLER COUNTER An especiallyfine piece of equipment with numerous ap-plications in radioactivity work.Price, FOB factory . . . . $345.00

A NEW GEIGER COUNTER TUBE A compact,completely enclosed counter tube of sturdyconstruction with many important features.Used extensively by leading laboratories.Price, FOB factory . . . . . $50.00

The instruments here illustrated are rugged andpractically foolproof . . . made from the highestgrade materials and designed for dependable per-formance under actual working conditions . . .

reliable performance at reasonable cost. Place yourorder now by mail.

Detail specification upon request

CYCLOTRON SPECIALTIES COMPANYStation B, Moraga, California

a a

Vol. 103, No. 266714


NOW! MAKE PHOTO-

COPIES OF ANYTHINGin your own office or laboratory,Quickly, Accurately, at Low Cost!

MAKE permanent, error-proofcopies-at 1-a-minute speed-

of anything written, typed, printed,.drawn or photographed-even if onboth sides. No darkroom or tech-nical knowledge needed. Save time,money, labor-expedite work. Getfull information-write TODAY!

PHOTOEXACT

AMERICA'S MOST WIDELY USEDPHOTOCOPY EQUIPMENT

FOR BETTER

GLASS COLORSTANDARDS

Permanent reliability of Hellige Glass Color Stand-ards, accuracy of color comparison, simplicity of thetechnique, and compactness of the apparatus are

exclusive features of Hellige Comparators not foundin any similar outfits.

WRITE FOR BULLETIN No. 602

HELLIG EINCORPORATED

3718 NORTHERN BLVD. LONG ISLAND CITY 1. N.Y.

UEBIG AND AFTER LIEBIGA Century of Progress inAgricultural Chemistry

A symposium organized and presentedby the Section on Chemistry of the Asso-ciation under the direction of a specialcommittee: Charles A. Browne, RichardBradfield, and Hubert B. Vickery. Thereare four papers under the heading of Or-ganic Chemistry, Enzymes and Nutritionand fve under the heading of Soils, Ferti-lizers and the Mineral Requirements ofPlants.

viii + 111 pages (7 x 100,14 illustrations, references, cloth binding;

published in 1942Price, $2.50; price to non-members

of the Association, $3.00.

American Association for theAdvancement of Science

Smithsonian Institution BuildingWashington 25, D. C.

EPORTS

LEERS

OVER 100OTHERS

Send foryour free copy of this informative bookAPECO'S 20-page, fully illustrated book givesyou the story of Photocopying-shows graph-icalY the "what" and "how" of this amaz-ingly simple procedure. Yours without obli-gation. Write today:AMERICAN PHOTOCOPY EQUIPMENT CO.2849 N. Clark St., Dept. AV26, Chicago 14, Ill.

Representatives in principal cities and Canade

February 8, 1946 15


Presenting! . . .

Another Important Van Nostrand Book

ELEMENTS OF PHYSICAL CHEMISTRYBy Samuel Glasstone

This completely modern text has been editedin the light of up-to-date developments in phys-ical chemistry. It provides an unusually thor-ough coverage of this science, and is writtenwith the clarity and simplicity that character-izes Dr. Glasstone's work.Here he sets forth the elementary concepts;and makes even the more complex principlesand relationships easy to understand. The styleof writing is readable and effective; the treat-ment of the subject is comprehensive and new.Elements of Physical Chemistry is a book thatmeets the need for a clear, full exposition ofmany topics which have often been difficult tograsp.Spring Publication Illustrated

Probable price $4.50

PARTIAL TABLE OF CONTENTS:Introduction; Atomic Theory; The Structure ofthe Atom; Electronic Structures of Atoms andMolecules; The Properties of Glass; Liquefac-tion and the Properties of Liquids; The SolidState; Thermodynamics and Thermochemistry;The Second Law of Thermodynamics; DiluteSolutions; Chemical Equilibrium; Free Energyand Chemical Equilibrium; Phase Equilibria;The Conductance of Electrolytes; Electromo-tive Force; Equilibria in Electrolytes; Hydrol-ysis and Neutralization; Surface Chemistry andColloids; Kinetics of Chemical Reactions; Pho-tochemistry; Miscellaneous Problems.

Write for an examination copy

D. Van Nostrand Company, Inc.250 Fourth Ave. New York 3, N. Y.

For bridging the gapbetween unaided visionand microscopy, we offer

The Master Magnifier SetAn assortment of fine magnifiers with

these unusual features:

Contains 7X, 20X and 40X magnifying units.

Built-in lighting units illuminate the objectsviewed; operated either by batteries, for field work,or by electric current, for office and laboratory.

The 40-power is fitted with a 0.001 inch scale.This will indicate dimensions of small objects anddetails not measurable with ordinary micrometers.

All in compact portable case

Ask for leaflet S-M

RL P. CARGILLE

AEROBIOLOGYviii + 299 quarto pages

(7 x 10i inches)ilstrated, reference

This volume, one of the Symposia Series,consists of 37 papers. Eight papers coverextramural aerobiology which is concernedwith the distribution of living organisby the exterior air and with some ofthe consequences of their distribution.Twenty-nine papers on intramural aero-biology cover (1) the problem of contagionby air-borne infectious materials, (2) ex-pulsion of secretions from the mouth andnose, and (3) infections from disemina-tion of pathogenic organisms into the op-erating room, the hospital ward, the schooland the home. Published in 1942. $4.00.

American Association for theAdvancement of Science

Smithsonian Tnstitution BuildingWashington 25, D. C.

16 Vol. 103, No. 2667

118 Liberty Street New York 6, W. Y.


Announcing ... a new visual aidThe ADEL COLOR SLIDE VIEWERFeatures...L Home illuminated With a 6' electrical cord. Theswitch controls self-contained flashlight batteries forportable use. Standard bulbs make replacement easyand inexpensie

Shows all types of 2x2" slides-paper, metal orglass qeounted.Two lens optical system magnifies without distor-

tion. No reflected light to create fussy ima4. Each color-slide positions easily-and upto 20 Willfeed in rotation to collect In compartment from whichthey are easily removed.6. Weighs le than 8 pounds with a durable long-lasting plastic case Molded feet protect furniture.No mog parts to wear out.

A-I7 ?..ah p1.7i

, CLA O I

KLETTELECTROPHORESIS

f

CUSTOM ADB

SOLE MANUFACTURER INUNITED STATES OF BLECTROPHOBESISAPPARATUS AND CELLS

KILETT MANUFACTURING CO.,179 EAST 87TH STREETNEW YORK, N. Y.

LANGUAGEIS POWER'..Forge oahd, win specalassignments, promotion, bet-ter job in global peace timeopportunities through abilityto speak a foreign language.

MASTER A NEW LANGUAGEquickly, easily, morrectly by

L IN UAkP HMON EThe world - famous Unguaphone ConversationalMethod brings voices of native teachers INTO YOUROWN HOME. You learn the new language byLISTENING. It's amazingly simple; thousands havsucceeded.ROME-STUDY COURSES IN 2 LANUAGES

Send for FREE book-LINGUAPHONE INSTITUTE.1 RCA Building, Now York 20, N.Y. * Circle 70630LINGUAPHONE INSTITUTEn7 RCA Bldg., New York MO, N.Y.Send mo the FREE Llnguaphone Book.Name ..........................................Address ... City.Language Interested..............................

-1,: :,.V 1 . 11 --------- - '-, -- a~ ---- -,

1%

., 1. w Aphamme

SW1

February 8, 1946 17


.HSAcidlmetry-Alkalimetry

LaMotte Acidinietric and Alkalimetric Standards arehighly purified compounds that are widely used asprimary standards In volumetric analysis.

Acidimetric StandardsPotassium Acid Phthalate ... . . CrystallineSulfamic Acid .. . ........ CrystallinePara NitrobenzoIc Acid . . . . . . Crystalline

Alkallmetric StandardsSodium Borate ..... . .. . CrystallineSodium Carbonate .... . . . . Anhydrous

Supplied in 100g., 500g. and 1000g. bottles

LaMotte Chemical Products CompanyDept. "H' Towson 4, Md.

Notice to Subscribers and Contributors

Communications relative to articles offered for publicationshould be addressed to Editor, Massachusetts and NebraskaAvenues, Washington 16, D. C.

Communications relative to advertising should be ad-dressed to Theo. J. Christensen, Massachusetts and NebraskaAvenues, Washington 16, D. C.

Communications relative to membership in the Associationand to all matters of business of the Association should beaddressed to the Permanent Secretary, A.A.A.S., SmithsonianInstitution Building, Washington 25, D. C.

Communications relative to subscriptions from nonmembersshould be directed to The Science Press, North Queen St. andMcGovern Ave., Lancaster, Pa.

.~ ~ V 1foaheeProfessional Assistance

E> In Editing scientific manu-scripts and journals-

F For Proofreading galley oftechnical publications-

E> In the preparation of indexesfor new books or volumes ofscientific journals-

Scientific editor with 20 years'experience will assist you

at reasonable rates.

Correspondence with authors, re-search laboratories and libraries in-vited through

Box 181, SCIENCE

Photoelectricwith p11 Determinationwith

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

While serving as pH meter, LUMETRON MOD.400 is equally suited for all colorimetric and turbid-imetric tests in chemical analysis. Price $130.0095 MadisomAve. PHOTOVOLT CORP. NewYork 16, N.y.

Write for literature on Photoelectric pH Determination.

Bacto-AgarBacto-Agar is a purified Agar prepared from

domestic material. In the manufacture ofBacto-Agar extraneous matter, pigmented portions,and alto are reduced to a minimum, so that theInished product in the form of fine granules willdissolve rapidly, giving clear solutions.

Bacto-AsparagineBacto-Asparagine is a purified amino acid

widely used in synthetic culture media and in thepreparation of tuberculin.

Specify "DIFCO"THE TRADE NAME OP THE PIONEERS

In the Research and Developt of Bacto-Peptone andDehydrated Culture Media.

DIFCO LABORATORIESINCORPORATBDDETROIT 1, MICHIGAN

-

lA

Ifittl 1191 littillitill 1A111111111

1 Ll-

18 Vol.. 103, No.. 2667

February 8, 1946

,0


I N T E M A R KE T P L A C E'RATES to be paid in advance. Regular setting 100 a word, minimum charge 12.00 each; count 8 words if a box address is used.Display, 3 inches maximum, $8.80 per column inch. No discounts or commissions.EEND advertisements with remittance to the ADVERTISING DEPARTMENT, American Association for the Advancement of Science,AMERICAN UNIVERSITY, MASSACHUSETTS AND NEBRASKA AVENUES, WASHINGTON 16, D. C. Correct remittancemtst accompany instructions and copy and advertisements will be published in sequence of completed orders.REPLIES to box number advertisements should be sent to the Advertising Department for forwarding.

POSITIONS OPEN

Physicists WantedA technical university in a large midwest city will makeseveral appointments in the Department of Physics tobegin about March 1st. Positions require teaching andresearch. Salary and rank will depend upon qualifica-tions. Need at least one Nuclear Physicist for a Van deGraff Laboratory. Please write giving full particularsand salary requirement. Box 349, SCIENCE.Opportunities Available-(a) Instructor in chemistry; Ph.D.required; duties consist of teaching organic, biological andharmaceutical chemistry; West. (b) Psychologist to estab-

1ish guidance center of eastern college having large enroll-ment of veterans World War II; preferable some one whohas had considerable experience in psychometric testing;(c) Chemist; preferably Ph.D. who has had B.S. In pharmacyor similar experience; research department large pharmaceu-tical company. (d) Biochemist; capable of supervising othertechnicians in laboratories of large hospital vicinity NewYork City; (e) Physiologist; duties consist entirely of re-search, principally in the field of cardiovascular physiologywith some work in the eye; new laboratories well endowed,splendidly equipped; central metropolis. (f) Bacteriologist;teaching appointment; eastern university; (g) Research as-sistants trained in (1) bacteriology, serology and parasitol-ogy; (2) virus, bacteriology and biochemistry; (3) histologi-cal technique and staining; (4) biochemistry, bacteriology;university medical school; West. S2-1 Medical Bureaiu(BURNEICE LARSON, Director), Palmolive Building, Chicago 11.

POSITIONS WANTED

Geologist, in oil industry during war, wishes to return toteaching. Prefers departmental position in petroleum geol-ogy and/or paleontology; or as one-man department. Box351, SCIENCE.The California Medleal Bureau, Agency for scientific and laypersonnel in medicine, biology, chemistry, physics, and alliedsciences, anupplies teachers, research workers, laboratorydienera, skilled office help. Prompt service. Registrationfree. Your patronage respectfully solicited. Tna CALI-PORNIA MEDICAL BUREAU, Agency, 605 East Colorado Boule-vard, Pasadena 1, California.Fellowship at a leading University desired by physical chem-ist for support of family during work toward M.'. and Ph.D.Box 852, SCIENCE.Baetoriologlsts, Biologists, Physlologists, Chemlsts, Pharma..eologists, Physiotherapists, laboratory Technielans, let ushelp you secure a position. Our srvice, established 1896,is nationwide. Write us today. All Information confidential.AzrWeo's-WOODWARD BUREAU, 30 North Michigan. Chicago 2.oneral ZoologIst-Ph.D. desires teaching or research posi-

tion. Experienced teacher. Most of training in generalphysiology and invertebrate zoology. SigmaXi Age 30-single; will go anywhere Now on terminal leave after iyears Army service as Aviation Physiologist. Minimumsalary $2,500. Box 342, SCIENCE.Opportunity Wanted-Physicist; Veteran World War II:M.S. and Ph.D. degrees (major, physics, minor mathematics);six years teaching experience consisting of four years as In-structor in physics and one year as assistant in electricalengineering; during war served as chief of tactics section ofchemical warfare school and as chemical officer; for furtherinformation please write BURNEICE LARsON, Director, TheMedical Bureau, Palmolive Building, Chicago 11.

Husband-wife biologist team, thoroughly capable, availableSept. for college or university; primary interests inverte-brates, general physiology, biophotography; able and will-ing handle other subjects. Each has wide post-doctoralteaching experience, numerous publications. Husband con-ducting full-timte war research In biophysics; wishes to re-turn to teaching-research combination. Box 353, SCIENCE.

BOOKSELLERS

Plants of Hawaii National Park-Illustrative of Plants andCustoms of the South Se. 3.33 pages with 139 illustrations,paper cover, nontechnical. $2.50 per copy. OTro DEGENER,Botanleal G(arden, Bronx Park, New York City.

Wanted to purchane-Scientific Periodicals, sets and runs,Foreign-IDonestlc. Entire litraries and smaller collectious.WALTER J. JOHNSON, 125 East 23rd Street, New York 10,N.Y.

Journals, Periodicals, Serial Publications-Sets, runs andsingle volumes bought and sold. Entire libraries purchased,J. S. CANNER COatPANY, Boston 15, Mass.

SUPPLIES AND EQUIPMENT

¼g" Discs for the Assay of Penicillinand other Antibacterial Substances

No. 740-E.

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

HIead Office: 116-118 West 14th St.

New York 11, N. Y.

M I C R O S C O P E SMX.DICAL-INI)USTRIAL-AMATEURSupplies-Accessories-Scientific InstrumentsSPENVER NEW and USED adS8i

Bought-Sold-Exchanged-RepairedRend for FREE LIST

NATIONAL SCIENTIFIC INSTRUMENT COMPANY119 CkSubersS. BA-7-9234 Xe Yrk City 7

Ultra Centrifuges-airdrtien, quantitative, analytical varioustypes or own specifications. Joe. GRzBmessas, 454 FeltonDrive, Menlo Park, California.

Experimenters---0 useful valuable new springs, 150 kinds;numerous sizes, 1/32 to 10 inches; expansion, compression,torsion, etc. Ifleal for experinient, models, repair. $5.00.Super assortment, $10.00. Smaller assortment, $5.00. Satis-faction guaranteed. TECHNICo, Box 246-X, West Hartford,Conn.

Laboratory Animals: Purest bloodliness, highest quality andhealth yet reasonably priced. Special contract prices onRabbits, Mice, Pigs and Pigeons. Also available Dogs, Cats,Hamsters, Rats and Chicks. JOHN C. LANDIS, Hagerstown,Maryland.

19

A~ IRL,-


SCIENCEBOOKS

from the

JAQUES CATTELL PRESSPlant GrowthBy EDWIN YOCUM, Associate Professor,

deorge Washington UniversityPlant Growth not only gives basic information of plantsthemselves, but is an excellent guide to the propagationand care of plants. Some sample subjects treated in thiswork, all with a high practical viewpoint, are: Seeds andSeedlings, Germination of Seeds, Root Structure andStems and Buds, Absorption of Water, Mineral Food andthe Soil, Insects and Diseases, Weeds, Flowers, Hybridiz-ing, Plant Hormones, Soil Improvement, Fertilizer, andRest Period of Plants.

JL_ 225 pages Illustrated $3.00

Hidden HungerBy ICIE G. MACY, Director of the Re-

search Laboratory for the Children'sFund of Michigan and Harold J. Wil-liams, Associate DirectorThis is the story of America's real health tragedy-hiddenhunger-the lack of a balanced diet. Concentrating onthe American food situation since 1930, Hidden Hungerdiscusses such problems as food quackery, in-plant feed.ing and the role nutrition will play in the establishmentof an enduring peace.286 pages $3.00

The Life History of anAmerican Naturalist

The Autobiography ofFRANCIS B. SUMNERUninhibited and worldly'is this life history of an Ameri-can naturalist, Francis B. Sumner, whose life reads likea contemporary comment on life itself-with rare andhumanly interesting passages on education, philosophy,religion, sex and scientific research. It is the story of aman who was not afraid to express himself unreservedlyon birth control, vivisection and race prejudice and toattack various religious and social dogmas.298 pages $3.00

Microbes of MeritBy OTTQ RAHN, Professor of Bacteriol-

ogy, Cornell UniversityThis is the first authoritative book for the general readerdevoted to the many kinds of microbes beneficial to man.Following a general introduction to the nature and activi-ties of bacteria in general, Prof. Rahn discusses in a non-technical, clear and readable manner the place and im-portance of penicillin and other antibiotic substances inaddition to the role played by bacteria in food processing-bread-making, wine fermentation, brewing of malt andbeer, distillation of alcohol and cheese-making.277 pages Illustrated $4.00

THE JAQUES CATTELL PRESSLANCASTER, PA.

Index to AdvertissName

American Association for the Advancementof Science ........ ........... Cover 3 and

American Optical Company ................- CoverAmerican Photocopy Equipment Company

Bausch&LombOptical Company ...........................TheBlakiston Company ...................................................R. P.Cargille ................... _

Jaques Cattell Press. .................. .

Clay-AdamsCompany, Inc.....................................ClassifiedAdvertising......................................................

The Coleman & Bell Company .. Cover

Cyclotron Specialties Company ..............................DifcoLaboratories, Inc....................................................

GammaInstrument Company ....................................

Graf-Apsco Company.. CoverHellige, Inc..................................................................................

Hoffmann-LaRoche, Inc................................................

KlettManufacturing Company .................................

LaMotte Chemical Products Company ............Leeds& Northrup Company ......................................

Linguaphone Institute ......................................................

TheMacmillan Company ................................................

McGraw-Hill Book Company, Inc.........................

The Mearl Corporation.. Cover

Merek &Company, Inc....................................................Photovolt Corporation .....................................................

Princeton University Press ..........................................

EdmundSalvage Company .........................................

W.B.Saunders Company.............................................TheTechnicon Company................................................

D.Van Nostrand Company ................... .

John Wiley & Sons, Inc ...................

Wyeth,Incorporated .................................3

Page

12

4

15

179

5

16

20

17

192

14

18

14

2

15

7

17

18

8

17

11

9

3

13

18

181

6

1

2

16

10

20 Vol. 103, No. 2667

l(+)ARGININEMO N.O H Y D R O C H LO R ID E

XANTHINEGUANINE

Till? MFJRLN CORPGR4TIOil

153 WAVERLY PLACE, NEW YORK 14, N.Y.

The most important scientific books of the past yearwill be shown at the

SCIENCE LIBRARYOf the 113th A. A. A. S. Meeting

St. Louis, March 27-30At each meeting of the A. A. A. S. the leading scientific publishers combine to presenttheir foremost publications of the preceding year in the Science Library. In additionmany of the companies have their own individual exhibits with additional books ondisplay.This year, the Science Library will have an unusually large and outstanding collectionof fine books. In many instances, material recently released from military securityregulations will be available for the first time. Extra space has been allotted to theScience Library so that there will be adequate facilities for leisurely inspection andreading of the many books on display.As in past years, the March issue of The Scientific Monthly will carry a listing of allbooks submitted for deposit in the Science Library up to the time the issue goes topress. And at the meeting a reprint of the listings, together with important announce-ments by the publishers and other exhibitors, will be distributed free.Trained librarians will be in attendance at the Science Library at all times and willassist those who wish to order books from the various publishers.Visit the Science Library at the meeting. It is arranged for your enjoyment andinspection by the cooperating publishers.

A MILESTONE PASSED

With their adoption of a newly-per-fected Polaroid* unit to replace costlycalcite prisms, these two Spencer Polar-iZing Microscopes have passed a long-sought milestone in instrument design.

In addition to making lower pricespossible, the new units provide bettercontrast of image and crispness of in-terference figures. Comparing favorablywith calcite in all other respects, theyhave won the approval of outstandingpetrographers.

Spencer Polarizing Microscope No. 42meets nearly every requirement of thegeologist, mineralogist, chemist, biolo-gist, and instructor. No. 43 is designedfor teaching and advanced chemical mi-croscopy. Other models, equipped withcalcite prisms, are available.

For complete details, write Dept B2.

American OpticalCOMPANY

Scientific Instrument DivisionBuffalo It, Ne* York

'Product of the Polaroid Corporation.

general chemistry · 2005. 7. 21. · laboratory manual for general zoology bytracyi. storer 154...

Documents