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Do Robertis, Nowinski and Saez'Textbook of General Cytology

NewT-Elementary in its approach-up-to-date in its methods and principles-thisnoteworthy text is unusually well-suited to undergraduate college courses. It is a

synthesis of the most important aspects of cellular structure and function as en-

countered in man and in animals. The "u!trastructure" of the cell is well explored.By E. D. P. DE ROBERTIS, M.D.. Department of Biology, Massachusetts Institute of Technology; W. W. NOWINSKI.Ph.D., Department of Anatomy. University of Texas Medical School; and FRANCISCO A. SAEZ, Ph.D.. Institute forthe Investigation of Biological Sciences, Montevideo. A translation by WARREN ANDREW, Ph.D., with changesand additions, of the Spanish text "Citologia General" by the same authors. 345 pages, 6" x 9", with 143 illus-trations, some in color. $5.50

Turner's General EndocrinologyNew!-Here, for the first time, is a truly biologic approach to endocrinology. It isan ideal text for undergraduate courses. The entire story of chemical regulators istold simply and clearly-and augmented by 349 beautiful illustrations.By C. DONNELL TURNER. Ph.D.. Associate Professor of Zoology, Northwestern University. 604 pages, 6" x 9", with349 illustrations on 164 figures. $6.75

Maximow and Bloom's Textbook of HistologyNew (5th) Edition-By adapting modern chemical and physical methods to theproblems of histology, Dr. Bloom has completely revitalized this ever-popularclassic text.By ALEXANDER A. MAXIMOW. Late Professor of Anatomy; and WILLIAM BLOOM, Professor of Anatomy. Univer-sity of Chicago. 700 pages, 61½1" x 10". with 562 illustrations, 32 in color. $8.50

SCIENCE, September 17, 1948, Vol. 108

Sau.nIerpiJxt /0 Iecent.J/clv(ance5 in 6lofoaictScienced

W. B. SAUNDERS COMPANY

tV&e3t l/adAinflen SotyaeV i 5PAilado Aia .5

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Mildred Atwood

Acting Editor

F. A. Moulton

Advertising Manager

Publications CommitteeFarrington Daniels, John E. Flynn, Kirtley p.

Mather, Walter R. Miles, Malcolm H. Soule,Steven M. Spencer

Vol. 108 No. 2803 Friday, September 17, 1948

CONTENTS

Physics in Central and SouthernEurope:Robert L. Platzman.................... 291

ObituaryTheodore Dru Alison Cockerell:

HerbertF. Schwarz .................... ................... 295

News and Notes .296

Comments and CommunicationsStarch Blue; Preparation of Succindialdehydeand Its Derivatives From Furan; Sex andVigor in Populus; Weed Control-A LiquidConcentrate of the Isopropyl Ester of 2,4-DMiscible With Oil or Water in Any Pro-portion ...................................... 302

Technical Papers

Significance of Distribution of Fluorescein inSarcoma 180:Daniel M. Shapiro and B. H. Landing ............ 304

Physiological Adjustments in Chloride Balanceof the Goldfish: Dallas K. Meyer ........................ 305

Transmission by Leaf Hoppers of the VirusCausing Phloem Necrosis of American Elm:W. L. Baker .......... ............................. 307

The Mechanism of Cysteine and GlutathioneProtection Against Alloxan Diabetes:Arnold Lazarow, John W. Patterson, andStanley Levey ............ ........................... 308

In the LaboratoryAdaptation of Selsyn Transmitters for Obtain-

ing Isometric Myographs on the Cathode-Ray Oscilloscope: Robert L. Bowman .................. 310

Effect of Calcium Chloride on the Preparationof Extracts of H. pertussis:Jean I. Burrell, K. C. Robbins, andLouis Pillemer ............ ........................... 311

The Path of Carbon in Photosynthesis:II. Amino Acids:W. Stepka, A. A. Benson, and M. Calvin 304 Scientific Book Register.-........................ 312

Science, a weekly journal, is published each Friday by theAmerican Association for the Advancement of Science atThe lousiness Press, Incorporated, N. Queen St. and McGovernAve., Lancaster, P'a. Founded in 1880. it has been since1900 the official publication of the AAAS. Editorial and Ad-vertising Offices, 1515 Massachusetts Avenue, N.WV.. Wash-ington 5. D. C. Telephone, EXecutive O10 or 6061. Cableaddress, SCIMAG, Washington, l>. C. Entered as second-class matter at the Post Office at Lancaster. 1'a., January 13,1948, under the Act of March 3, 1879. Acceptance for mail-ing at the special rate postage provided for in the Act o1Felbruary 28, 1925, embodied in paragraph 4, Sec. 538. P. Land R.. authorized January 13, 1948,

Articles offered for publication should be sent to the Eldi-tor. The AAAS assumes no responsibility for the opinionsexpressed by contributors. Memiibership correspondence forthe AAAS should be sent to the Administrative Secretary.Annual subscription, $7.50; single copies, $.25; foreign

postage (outside the Pan-American Union), $1.00 extra;

2

Canadian postage, $.50 extra. Remittances and orders forsuls(.rii)ti(nal and single cop-ies should lie sent to the Circula-tioxn 1Departiient, AAAS, Nortb Queen Street and McovernAvenne, La ncaster. P'ennsyl vania, and 1515 MassachusettsAveiulle, N.W., WVashiiigton 5. ft. C. Claims for missing num-bers will not lie allowedl if received more than 60 days fromdate of issue No claiiiis allowed from suliscrilers in CeitralEurope, Asia, or the l'aciic Islandls other than tlawali or be-cause of failure to notify the Circulation IDepartment of achange of address or because copy is missing from the files.Change of address. Four weeks notice in required for

change of address This should lie sent to Science, 1515Massachusetts Avenue, N.W., Washington 5, D. C. Whenordering a cbange, please furnish an adl(lress stencil labelfront a recent issue. Address changes can lie made only ifthe old ats well as the new address is supplied.The Aiiierican Association for the Advancement of Science

also publishes The scientific Monthly. Subscription rateson request.

SCIENCE, September 17, 1948, Vol. 108

Anatomically speaking . . .A brief mention of some Blakiston books that, between them, alapproach Anatomy from just about every useful point of view.

BUNDY: Anatomy and PhysiologyA text for beginning students so concise, well-planned and satisfactory to allconcerned that it has reached its 7th edition. 490 pages, 283 illustrations. $3.50.

DAVISON'S Mammalian Anatomy <A very popular text that uses the cat in teaching vertebrate zoology. Also inits 7th edition, this text is valued for its clear, detailed instructions and uniquedrawings. Intended for students majoring in psychology, education, physi-ology, biology, pre-medical and other courses. 349 pages, 187 illustrations.$4.25.

EDWARDS: Concise AnatomyAn introductory course on the structure of the human body. A new book witha future among students of nursing, dental hygiene, physical education, physi-cal therapy, science teaching in normal schools and liberal arts colleges. 548pages, 472 illustrations. $5.50.

EDWARDS: Synopsis of General AnatomyA new book reprinting the first seven chapters of the author's "Concise Anat-omy", mentioned above. Highly approved as suitable for use as a text in one-semester and orientation courses taken as preliminary to specialized study. 151pages, 76 illustrations. $2.75.

MORRIS: Textbook of Human AnatomyOne of the most famous and standard of all medical books, now in its 10thedition. Written by eminent teaching anatomists for the medical student whointends to practice, and for the library of physicians and surgeons generally.1641 pages, 1155 illustrations. $14.00.

POTTER: Compend of Human AnatomyA concise text of high value to students, physicians, nurses and others pre-paring to pass an examination. Though planned for quick review, it offersgreat help in acquiring and retaining an important body of information. 430pages, 139 illustrations. $2.50.

THE BLAKISTON COMPANY Philadelphia 5, Pa.

SCIENCE, September 17, 1948, Vol. 108 3

Cathode-Ray OSCILLOSCOPE

No. 71551 Cathode-Ray Oscilloscope is of improved de-sign and excellent manufacture. Its sweep circuit has improvedlinearity over the entire range of frequencies. Its deflection sen-sitivity is 1 volt (r.m.s.) per inch with gain control at maximumand the input impedance is .5 megohms across approximately 20mmf. Usable frequency range for amplifier is 10 cycles to 300,000cycles per second. Sweep frequencies range from 10 cycles to60,000 cycles per second. The cathode-ray tube has a screen ofmedium persistence. A tap is provided on the front panel for 6volts AC at Y2 amp. for furnishing 50 to 60 cycle line current toeither vertical or horizontal plates. Terminals are provided onthe rear panel for direct connection to the deflecting plates for usewhen impedance, voltage or frequency requirements preclude con-nection- through the amplifiers. The graph screen is easily ad-justed or removed if desired. Dimensions, over-all: height 12Y4inches; width, 8 inches; depth, 14 inches; weight, 21 lbs.

Available at ....... $95.75

No. 71552 Cenco Cathode-Ray Oscilloscope with char-acteristics similar to 71551, but made with a 5-inchscreen, is available at $135.00

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SCIENCE, September 17, 1948, Vol. 1084

LEITZ INCLINED BINOCULAR MICROSCOPE BS 25/92

FOR THE MEDICAL PROFESSION

The purchase of a microscope is an invest-ment for life. For that only the best is goodenough. A microscope should not only havesuperior mechanical features, but the opticalperformance, the crispness of the image andthe flat field are the important things tolook for.

There are almost 400,000 Leitz microscopes

in use throughout the world. Their superiorcraftsmanship has been proven again andagain, backed by a company that will soonenter the century mark of experience in themanufacture of scientific instruments knownin all corners of the globe. For particulars onLeitz Inclined Binoculars BS 25/92 ask forCatalog No. 403.

E. LEITZ INC., 304 HUDSON ST., NEW YORK 13, N. Y.SCIENCE, September 17, 1948, Vol. 108 5

Ready this fall

INTRODUCTION TO HISTORICAL GEOLOGYBy Raymond C. Moore, Professor of Geology, University of Kansas

In this text of unusual interest, a universally recognized authority presents an exceptionally read-able, well-organized account of the important feat ires of earth history, including evolution of plantsand animals recorded by fossils. Avoiding technical terminology, the author makes clearly under-standable how observed geologic features furnish a record of past conditions and events.

Now ready

PRINCIPLES OF MATHEMATICAL PHYSICS. New Second EditionBy William V. Houston, President, Rice Institute. International Series in Pure andApplied Physics. 363 pages, 6 x 9, $5.00

Supplies mathematical methods of treating physical problems of increasing complexity and fills thegap between elementary courses in physics and advanced courses on special subjects. Problems as ateaching aid are emphasized. Many of the discussions have been clarified, and a considerable amountof new material has been added.

Ready in OctoberPRINCIPLES OF MECHANICS. New Second EditionBy John L. Synge, Professor of Mathematics, Carnegie Institute of Technology andB. A. Griffith, Assistant Professor of Mathematics, University of Toronto.

A revision of a well-known text for intermediate courses in mathematics, physics, and engineeringmechanics departments. Changes throughout clarfy the material, and a number of sections dealingwith units and dimensions have been added. An outstanding feature is the account of the motion ofa charged particle in an electromagnetic field. The new treatment of this material is more compre-hensive, yet much simpler in principle than that appearing in the first edition. A section on electronoptics is included.

Just publishedESSENTIALS OF PSYCHOLOGY. An Introductory TextbookBy Donald M. Johnson, Professor and Hea I of the Department of Psychology, Uni-versity of Minnesota, Duluth Branch. 490 pages, 6 x 9, illustrated, $3.50

This new text written for the beginning student gives a well-balanced survey of the subject whichwill equip him with the standard psychological topics, methods, and terminology. The organiza-tion of the book should be particularly helpful in that it integrates the general principles and indi-vidual differences, and experimental psychology and clinical psychology. Many illustrations, ex-amples of psychological tests, pictographs, etc., enliven the work and heighten the students' interest.

Send for copies on approval

MCGRAW-HILL BOOK COMPANY, INC.330 WEST 42nd STREET NEW YORK 18, N. Y.

SCIENCE, September 17, 1948, Vol. 1086.

c47taIfdI /wnatncejA Series of Outstanding Importance

BELIEVING that a full knowledge of our scientists' vitally important atomic research accomplish-ments will make possible a marked increase in more efficient technology, the United StatesAtomic Energy Commission and Columbia University released a nation-wide announcement

on March 4, 1948, outlining their plans for public distribution and sale of the first two volumes ofthe Manhattan Project Technical Section of the National Nuclear Energy Series.The approximately sixty-volume Manhattan Project Technical Section will be published by the McGraw-Hill BookCompany handling the publication for the Atomic Energy Commission and its research contractors.

Governmental planning of the publication of atomic and nuclear discoveries and developments began in May 1944,and in November 1945 the project was authorized under the name "Manhattan Project Technical Series," sincethe work was done largely under the Manhattan Project, War Department, predecessor of the U. S. Atomic EnergyCommission.

Among the volumes scheduled for early publication:

HISTOPATHOLOGY OF IRRADIATION FROM EXTERNAL ANDINTERNAL SOURCESEdited by WILLIAM BLOOM, M.D., University of ChicagoApproximately 875 pages

PHARMACOLOGY AND TOXICOLOGY OF URANIUM COMPOUNDSWith Sections on the Pharmacology and Toxicology of Certain Fluorides andoi Special Materials.

Edited by Carl Voegtlin, M.D., formerly Chief, Division of Pharmacology, NationalInstitute of Health, U. S. Public Health Service; formerly Director of Cancer Re-search and Chief of the National Cancer Institute; former President of the Society ofPharmacology and the association of Cancer Research; and Harold C. Hodge, Pro-fessor of Pharmacology and Toxicology, University of Rochester, School of Medicineand Dentistry.

Write for further information

MCGRAW-HILL BOOK COMPANY, INC.330 WEST 42nd STREET NEW YORK 18, N. Y.SCIENCE, September 17, 1948, Vol. 108 7

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WRITE for complete informa-tion and a demonstration. Bausch& Lomb Optical Company,642-V St. Paul St., Rochester2, New York. ..

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SCIENCE, September 17, 1948, Vol. 108

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