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Friday, 4 October 1946 C IE CE\ T In This Issue Growth and Aging Problems in Agriculture Samuel Brody Technical Papers News and Notes In the Laboratory Book Reviews Letters to the Editor Table of Contents, Page 2 Published by the American Association for the Advancement of Science 113th AAAS Meeting-Boston, 26-31 December 1946 _.M VOL. 104 NO. 2701 PAGES 307-334

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Friday, 4 October 1946

C I ECE\T

In This Issue

Growth and Aging Problems in AgricultureSamuel Brody

Technical Papers

News and Notes

In the Laboratory

Book Reviews

Letters to the Editor

Table of Contents, Page 2

Published by the

American Association for the Advancement of Science113th AAAS Meeting-Boston, 26-31 December 1946

_.M

VOL. 104 NO. 2701 PAGES 307-334

EXTRA YARDAGE WITH THE WIND

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SCIENCE-ADVERTISEMENTS

Timelinesslus

Authority

* The greatly increased need forknowledge of tropical diseaseshas necessitated addition of muchnew material to the literature.None of these contributions, areof greater significance than thefour books described below. Intimeliness and authority theymeet clearly defined needs.

Russell, West & Manwell's Mackie, Hunter & Worth'sPractical Malariology Manual of Tropical Medicine

This is a new book issued under the auspices ofthe National Research Council. Its purpose-admirably fulfilled-is to present under onecover the latest knowledge of Malaria; clinical,laboratory and field data. Its six sections dealrespectively with the parasite, the mosquito, theman, the community, prophylaxis and control,and therapeutic malaria.By PAUL F. RUSSELL, M.D., M.P.H., Colonel, M.C., A.U.S.,Parasitology Division, Army Medical School; LUTHER S.WEST, PH.D., Head of Biology Department, Northern Michi-gan College of Education; and REGINALD D. MANWELL, Sc.D.,Professor of Zoology, Syracuse University. 684 pages, 6" x9%", 238 illustrations, 8 in colors. $8.00.

Also a National Research Council Manual. Theauthors have had wide first-hand experience andas a result their book has been recognized as oneof the most complete coverages of tropical dis-eases in print. Distribution, etiology, epidemiol-ogy, clinical characteristics, prophylaxis, treat-ment and laboratory methods are all discussed.By Colonel THOMAS T. MACKIE, M.C., Major GEoRGE W.HUNTER, III, SN.C., and Captain C. BROOKE WORTH, M.C.,A.U.S. 727 pages, 6" x 9", with 284 illustrations, some incolor. $6.00.

Ash & SpitZ' AtlasConant and Others' of Pathology of Tropical Diseases

Manual nf rlinipl Uuiplanffuualmuam uu uimuuikal liul3 ugusuThe National Research Council sponsored thismanual in order to make available a really con-cise, clear-cut working knowledge of mycotic dis-ease. The part of this manual in simplifying andclarifying this knowledge for those not exten-sively schooled in the field is immeasurable.By NORMAN F. CONANT, PH.D., DONALD STOVER MARTIN, M.D.,DAVID TILLERSON SMITH, M.D., ROGER DENIO BAKER, M.D.,and JASPER LAMAR CALLAWAY, M.D.; Duke University Schoolof Medicine. 348 pages, 5%4 x 7%", with 288 illustrationson 148 figures. $3.50.

The first book of its kind. It contains 941 illus-trations on 257 plates, some in color. These pic-tures were drawn largely from the Army Insti-tute of Pathology and are remarkable for theirthird-dimensional characteristics. Amplified byconcise text descriptions, this is a pictorial por-trayal of the progressive tissue changes seen intropical diseases.By Colonel J. E. ASH, M.C., U.S.A., Director; and SOPHIESPITZ, M.D., C.S., A.U.S., Pathologist, the Army Institute ofPathology, Army Medical Museum. 350 pages, 8" x 10%",with 941 illustrations on 257 plates, some in color. $8.00.

W. B. SAUNDERS COMPANY, West Washington Square, Phila. 5

.l

4 October 1946 1

a a ^ ^ a a 5 a an

SCIENCEEditor: Willard L. Valentine

Aasistant Editor: Mildred Atwood Advertising Manager: Theo. J. ChristensenPolicy Committee: Malcolm H. Soule, Roger Adams, Walter R. Miles and Kirtley F. Mather

VOL. 104 FRIDAY, 4 OCTOBER 1946 No. 2701

Contents

Growth and Aging Problems in Agriculture:Samuel Brody ...... ..................................... 307

TECHNICAL PAPERSCardiac Failure in Cattle on Vitamin E-free Ra-

tions as Revealed by Electrocardiograms:Thor W. Gullickson and Chas. E. Calverley ............... 312

Influence of Purified Lignin on Nitrification inSoil:JamesE. Fuller ............ ............................... 313

Administration of Streptomycin in Peanut Oil andBeeswax and in Solvecillin:

JohnA.Kolmer,et al ........................................... 315

Effect of Di-Isopropyl Fluorophosphate (DFP) onthe Action Potential of Muscle:

Rend Couteaux, et al ............................................ 317

Derivation, Interpretation, and Application of theSecond Law of Thermodynamics:

P.G.Nutting ....... .................................... 317

NEWSAND NOTES .. ......................................... 319

IN THE LABORATORYA Collapsible Metal Stirrer:

J. David Reid and Edmund M. Buras, Jr 326

Penicillin Blood-Level Determinations With a Strep-tococcus dysgalactiae Resistant to Normal BloodInhibitors: J. C. Kakavas and E. G. Scott ............ 327

LETTERS TO THE EDITOR

Taxonomy and the Biologists: Z. P. Metcalf ............... 328

Dormant and Adventitious Buds: Isador Aaron ...... 329

Aseptic Cultivation of Excised Plant Embryos:Margaret Newcomb and Ralph E. Cleland ............... 329

A Regrettable Error: Joel W. Hedgpeth ........................ 330

Potentiation of the Antibiotic Activity of Asper-gillic Acid by Bismuth: Andres Goth ........................... 330

Disease Control in Frogs: S. Meryl Rose ........................ 330A Further Note on the Meaning of Normal:

Chauncey D. Leake ........ ................................... 330

Iron Concentrations in Cholinesterase Prepara-tions:RobertD. Barnard ........................................... 331

Hypoparatypes:Hobart M. Smith ....................................... 331

Rigid Thinking in the Social Sciences-A VitalNeed:Zachariah Subarsky ........................................... 331

On the Question of Russian Scientists:William Marquette .......... ................................. 332

BOOK REVIEWS

Electron and nuclear counters-theory and use:A. Korif.

ReviewedbyGladys A. Anslow .......................................... 332

The effect of smallpox on the destiny of the Amer-indian: E. Wagner Stearn and Allen E. Stearn.

Reviewed byGeorgK.Neumann ....................................... 333Theory and practice of filtration:

George D. Dickey and Charles L. Bryden.Reviewed byH.L. Olin .......333

Human embryology: Bradley M. Patten.Reviewed by Madge Thurlow Macklin ........................ 333

Diseases of the retina: Herman Elwyn.Reviewedby W. L. Benedict ............ .................... 334

SCIENCE: A Weekly Journal, since 1900 the official organ Communications relative to advertising should be addressedof the American Association for the Advancement of Science. to THEO. J. CHRISTENSEN, 1515 Massachusetts Avenue, N.W.,Published by the American Association for the Advancement Washington 5, D. C.of Science every Friday at Lancaster, Pennsylvania. Communications relative to membership in the Association

and to all matters of business of the Association should beCommunications relative to articles offered for publication addressed to the Administrative Secretary, AAAS, 1515 Mas-

should be addressed to Editor, 1515 Massachusetts Avenue, sachusetts Avenue, N.W., Washington 5, D. C.N.W., Washington 5, D. C. Annual subscription, $7.50 Single copies, 25 cents

Entered as second-class matter July 18, 1923 at the Post Office at Lancaster, Pa., under the Act of March 3, 1879.

SCIENCE-ADVERTISEMENTS

NUCLEAR PHYSICS TABLESby J. MATTAUCH

and AN INTRODUCTION TO NUCLEAR PHYSICSby S. FLUEGGE

CONTENTS1. STABLE NUCLEI. Isotopes and Mass Numbers * Mass Defects Nuclear Massesand Extranuclear Electrons * Relative Abundance and Atomic Weight Nuclear SpinNuclear Magnetic Moment - Quadrupole Moment.2. NUCLEAR REACTIONS.3. UNSTABLE NUCLEI.4. SYSTEMATICS OF STABLE NUCLEI.TABLES AND PLATES. Properties of Stable Nuclei * Maximum Possible Abundanceof Probably Nonexistent Nuclei * Mass-Spectrographic Measurement of Doublets - Surveyof Known Nuclear Reactions; Properties of Artificially Radioactive Nuclei . Energy Releasein Nuclear Reactions * Packing Fraction and Mass Defect Curves * Known Nuclei andReactions on an N-Z diagram.

1946. 7% x 10%. 200 pages. 28 diagramsand numerous four-color plates. $12.00

Translated from the German and published withthe consent of the Alien Property Custodian

MESON THEORY OF NUCLEARFORCES by WOLFGANG PAULI

CONTENTS1. VARIOUS TYPES OF MESON FIELDS. Scalar Charged Meson Field Pseudo-scalar Symmetric Theory * Vector Field Theory.2. THEORY OF EXTENDED SOURCE.3. SCATTERING OF MESONS. Magnetic Moment in the Strong Coupling Case . Mag-netic Moment in the Weak Coupling Case.4. QUANTUM THEORY OF SCATTERING. Theory of Radiation Damping * Heisen-berg's "Observable Quantities."5. THEORY OF NEUTRON-PROTON SCATTERING.6. STRONG COUPLING THEORY OF THE TWO-NUCLEON SYSTEM.1946. 5% x 8. 80 pages. $2.00

DIFFERENTIAL and INTEGRAL CALCULUSby R. COURANT

Vol. 1. 6 x 9. 630 pages. 2nd rev. ed. 1937. $5.00Vol. I1. 6 x 9. 692 pages. 1936. $7.00

For a complete list of publications write for our 1946 catalogue.

INTERSCIENCE PUBLISHERS, INC. (i

4 October 1946 3

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SCIENCE-ADVERTISEMENTS

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SCIENCE-ADVERTISEMENTS

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SCIENCE-ADVERTISEMENTS7

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phone user can hear the oper-ator more clearly, and she inturn hears better too- throughthe improved receiver andtransmitter. Her voice entersthe transmitter at an evenlevel because, as she turns,

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SCIENCE-ADVERTISEMENTS

FOR BIOLOGICAL PROCEDURES

LONG-CONTINUED EXPERIMENTATION with animals in our own labora-tories has led to the development of many special diet materials whichwe have found valuable in nutritional research. While the prepara-tion of these materials in small quantities in the individual laboratorywould be troublesome and costly, our production facilities enable usto offer them- conveniently packaged and economically priced-asa service to investigators engaged in biological assay and research.

VITAMIN TEST CASEIN GBI. Uniformly free of vitamins A and D, as well as theknown factors of the vitamin B complex and vitamin K.

VITAMIN A TEST DIET, U. S. P. XII, GBI. For depletion of animals within allottedtime-weight limits specified for Vitamin A assays.

RACHITOGENIC DIET NO. 2, U. S. P. XII, GBI. For depletion of animals withinallotted time-weight limits specified for vitamin D assays.

VITAMIN B COMPLEX TEST DIET GBI. For use with suitable animals and ex-periments, to produce deficiencies of thiamine chloride, riboflavin, niacin, pyri-doxine and pantothenic acid.

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WRITE for complete list and prices of these and other diet materi-als, including crystalline vitamins, amino acids, casein hydroly-sate, biotin and other chemicals of biological significance.

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8 Vol. 104, No. 2701