SCIENCEVOL. 103 Friday, March 8, 1946 ! NO. 2671

In This Issue

The Neutron, the Intermediate or Compound Nucleus,and the Atomic Bomb

William Draper Harkins

News and Notes

Letters to the Editor

Technical Papers

Obituary Catalogue Corner

Complete Table of Contents Page 2

Published by the

American Association for the Advancement of Science

Inorganic and Organic Chemicals

Biological StainsSolutions

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Chemical Indicators : Test Papers

flMen' o/ .AcievemenIin the World of Chemistry

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brief biographies of "Men ofAchievement in the World ofChemistry" will appear in theApril 5th issue.

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MASSERMAN'S

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To enhance further the value and usefulness of this new book, the author has includedfour important appendices, an extensive and up-to-date bibliography, and a Glossarydefining more than 1000 terms.By JULES H. MASSERMAN, M.D., Division of Psychiatry, Department of Medicine, University of Chicago. 322pages, W" x 91/. $4.00

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SCIENCEEditor: Willard L. Valentine

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

VOL. 103 FRIDAY, MARCH 8, 1946 No. 2671

Contents

The Neutron, the Intermediate or Compound Nucleus,and the Atomic Bomb.

WilliamDraperHarkins ........................................... 289

OBITUARY

ThomasJ.Maney:A. T. Erwin ........................................... 302Bruce Lawrence Clark: Charles L. Camp ........................ 302

TECHNICAL PAPERS

The Effect of B-Pyracin and the Lactobasilluscasei Factor Upon Hemoglobin RegenerationFollowing Hemorrhage:M. L. Scott, L. C. Norris, and G. F. Heuser ............ 303

The Site of Action of DDT in the Cockroach:Kenneth D. Roeder and Eliraobeth A. Weiant ......... 304

SCIENCE: A Weekly Journal, since 1900 the official organof the American Association for the Advancement of Science.Published by the American Association for the Advancementof Science every Friday at Lancaster, Pennsylvania.Communications relative to articles offered for publication

should be addressed to Editor, Massachusetts and NebraskaAvenues, Washington 16. D. C.

Entered as second-class matter July 18, 1923 at the Post

Molecular Weights and Other Properties of Virusesas Determined by Light Absorption:

GeraldOster ...........................................

NEWSANDNOTES ............. .............................. 308

LETTERS TO THE EDITORNuclear Energy and the Polar Icecap:

BRaymond T. Ellickson .................... ....................... 316Transmission of Papaya Bunchy Top by a LeafHopper of the Genus Empoasca:

JosM Adsuar .............. ....................... ..... 316Geopathology, a Branch of Biometeorology:

Frederick Sargent, II ............ ......................... 316Retention of High School Science:

Cyril E. Abbott ........ ............................. 317

CATALOGUE CORNER ............ ......................... 318

Communications relative to advertising should be addressedto THEO. J. CHRISTENSEN, Massachusetts and Nebraska Ave-nues, Washington 16, D. C.Communications relative to membership in the Association

and to all matters of business of the Association should beaddressed to the Permanent Secretary, A:A.A.S., SmithsonianInstitution Building, Washington 25, D. C.Annual subscription, $6.00 Single copies, 15 cents

Office at Lancaster. Pa.. under the Act of March 3, 1879.

SCIENCE-ADVERTISEMENTS

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The large amount of practical work done in thefield of microanalysis in recent months makesthis new book exceptionally valuable to modernstudents and industrial chemists. The bookgives a detailed description of methods includ-ing the various newer procedures of an "inter-national" character which have been foundespecially valuable. Each method presented isfollowed by an orderly sequence of sub-sections-introduction, apparatus, reagents, procedure,calculations, notes, references, etc. WherePregl's methods are still considered the mostreliable and convenient, they have been retainedand adapted to fit into the above scheme, m6di-fications due to other workers being introducedwhere appropriate. Entirely new sections havebeen introduced which might be considered onthe borderline between organic and physical orinorganic methods of microanalysis but whichare frequently used by organic chemists. Ex-

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Although the fact is not widely known, geopathologyis a branch of an already established science called bio-meteorology. Hippocrates knew of these problems whenhe wrote his Airs, waters and places, and Hirsch's andDrake's treatises on geopathology, published in the1850 's, are classics of medical literature. For manyyears, however, interest in these problems has been lack-ing, but along with the recent growth of interest in theproblem of constitution, investigations of the influenceof the environment on man have appeared in increasingnumbers. In particular, workers both in this countryand in Europe have been studying the influences ofweather, climate, and altitude on plants and animals.This study has been designated biometeorology, and in1939 a section devoted to the literature of this field wasfounded in Biological Abstracts under the section onEcology. Some of the divisions of biometeorology aremedical climatology, meteoropathology, geopathology,and climatotherapy. At the present time the Committeeon Climatology of the American Geophysical Union isattempting a classification of the branches of bio-meteorology so that the existing and forthcoming litera-ture will be readily available to the interested workers.

Although our knowledge is incomplete, it is certainlynot fragmentary; for there is already available a vastliterature on biometeorology. In recent years a numberof excellent monographs have appeared, summarizingsome of that knowledge. W. F. Petersen's The patientand the weather (4 vols., 1934-1938) and M. Piery 'sTraits de climatologie: biologique et mrdicale (3 vols.,1934) are among the most extensive. B. de Rudder 'sGrundriss einer Meteorobiologie des Menschen (1938)outlines many of the fundamental principles of thescience. C. A. Mills' Medical climatology (1939) is ananalysis of the seasonal and geographical variation ofdisease. A. G. Price has admirably analyzed the prob-lem of the White settlers in the tropics (1939), and D. H.K. Lee (Univ. Queensland Pap., 1940, 1, 1-86) has sum-marized the literature on the physiology of acclimatiza-tion.

I do, however, agree with Dieuaide that there is a greatneed for a systematic investigation of these problems,for a correlation of available literature to serve tofocus attention on the problems requiring further study,and for collaboration among the interested investigatorsso that the research may be carefully planned and effi-ciently executed to reveal the facts and make the ac-quired knowledge applicable.

FREDERICK SARGENT, II, StudentBoston University School of Medicine

Retention of High School ScienceWhen I read the recent comment of Charles A. Gramet

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at the time requesting that those who had studied thesubject in high school indicate that fact. The resultsastonished me. Of some 50 students who had studiedsecondary school biology, only 10 ranked higher than

BACK IN STOCK

In Humun Reproductionby George W. Corner

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317SCIENCE