SCIENCE NEW SERIES FRIAY FEBRUARY 13, 1942 SUBSCRIPTION, $6.00 VOL. 95, No. 2459 FRDY ERAY1,14 SINGLE COPIES, .15 on Organic Chemistry By E. WERTHEIM, Ph.D.| University of Arkansas New! Introductory Organic Chemistry This 1942 text was especially planned to meet the needs of students in home economies and agriculture. The introductory chapter presents the relationships of organic chemistry to other sciences and to daily life. The structure of typical compounds is worked out to show the value of graphical formulas and how they are determined. Equations are repeated where desirable as an additional teaching aid. Vitamins are given careful study; formulas for vitamins known up to September 1941 are included. Fats, car- bohydrates and proteins are given adequate treatment in preparation for courses in nutrition and bio- chemistry. Summaries, review questions and specially prepared charts are included. Among the illus- trations are views of industrial equipment, animals with vitamin deficiency diseases, models of organic molecules, and numerous line drawings. 82 Illus., 482 Pages, $3.00 (1942) Widely Adopted! Textbook oI Organic Chemistry Intended for students who will major in chemistry or specialize in organic chemistry, and for those who are enrolled in pre-medical or chemical engineering courses, this teachable text presents material for a two-semester beginning course. The salient facts are stated in a definite manner. Numerous cross ref- erences are used to give emphasis to the important relationships between compounds and reactions. Charts and summaries aid in the initial study and facilitate review. Detailed flow sheets illustrate im- portant industrial processes. Portraits and biographical sketches of chemists are included. Tables of physical constants of organic compounds are given. The subject is presented in a logical, comprehensive way and adequately meets the needs of the students for whom the book was written. 110 Illus., 830 Pages, $4.00 (1939) Successful! Laboratory Guide ror Organic Chemistry Ed. This very useful laboratory guide, presents experimental material for a year 's course in elementary organic chemistry. Brief directions for conducting experiments in the identification of compounds, and a short section on "spot tests" are included. The large number of experiments makes selection possible. The clear and intelligible manner of presentation permits a minimum of supervision. A practical style of flexible binding and a page size appropriate for laboratory table use adds to the book's utility. Illus- trated, Wire-O-Binding $2.00 (1940) THE BLAKISTON COMPANY, Philadelphia Science: published weekly by 'The Science Press, Lancaster, Pa. Entered as second-class matter July 18, 1923, at the Post Office at Lancaster, Pa., under the Act of March 3, 1879. Three Important Books a . 0 _.
Transcript
SCIENCENEW SERIES
FRIAY FEBRUARY 13, 1942SUBSCRIPTION, $6.00
VOL. 95, No. 2459 FRDY ERAY1,14 SINGLE COPIES, .15
on Organic ChemistryBy
E. WERTHEIM, Ph.D.|University of Arkansas
New!Introductory Organic Chemistry
This 1942 text was especially planned to meet the needs of students in home economies and agriculture.The introductory chapter presents the relationships of organic chemistry to other sciences and to dailylife. The structure of typical compounds is worked out to show the value of graphical formulas and howthey are determined. Equations are repeated where desirable as an additional teaching aid. Vitaminsare given careful study; formulas for vitamins known up to September 1941 are included. Fats, car-bohydrates and proteins are given adequate treatment in preparation for courses in nutrition and bio-chemistry. Summaries, review questions and specially prepared charts are included. Among the illus-trations are views of industrial equipment, animals with vitamin deficiency diseases, models of organicmolecules, and numerous line drawings. 82 Illus., 482 Pages, $3.00 (1942)
Widely Adopted!Textbook oI Organic Chemistry
Intended for students who will major in chemistry or specialize in organic chemistry, and for those whoare enrolled in pre-medical or chemical engineering courses, this teachable text presents material for atwo-semester beginning course. The salient facts are stated in a definite manner. Numerous cross ref-erences are used to give emphasis to the important relationships between compounds and reactions.Charts and summaries aid in the initial study and facilitate review. Detailed flow sheets illustrate im-portant industrial processes. Portraits and biographical sketches of chemists are included. Tables ofphysical constants of organic compounds are given. The subject is presented in a logical, comprehensiveway and adequately meets the needs of the students for whom the book was written. 110 Illus., 830Pages, $4.00 (1939)
This very useful laboratory guide, presents experimental material for a year 's course in elementaryorganic chemistry. Brief directions for conducting experiments in the identification of compounds, anda short section on "spot tests" are included. The large number of experiments makes selection possible.The clear and intelligible manner of presentation permits a minimum of supervision. A practical styleof flexible binding and a page size appropriate for laboratory table use adds to the book's utility. Illus-trated, Wire-O-Binding $2.00 (1940)
THE BLAKISTON COMPANY, PhiladelphiaScience: published weekly by 'The Science Press, Lancaster, Pa.
Entered as second-class matter July 18, 1923, at the Post Office at Lancaster, Pa., under the Act of March 3, 1879.
Three Important Booksa.
0_.
2 SCIENCE-ADVERTISEMENTS VOL. 95, No. 2459
The Crow Language
Grammatical SketchAnd Analyzed Text
byRobert H. Lowie
UNIVERSITY OF CALIFORNIAPUBLICATIONS IN
American Archaeology and EthnologyVolume 39, No. 1, pp. 1-142
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STRANGE MALADYThe Story of Allergy
BY WARREN T. VAUGHAN
In this book one of the most common maladiesto which human beings are subject is discussedfor laymen by a man who is as distinguished forhis literary style as for his eminence as a scientist.It is a book that is as interesting as it is valuable.
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SCIENCE-ADVERTISEMENTS VOL. 95, NO. 24592
SCIENCE-ADVERTISEMENTS 3
VITAMIN-FREE CASEIN- ~SMACO
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Write for the booklet "Spe- 1. ANSBACHER, S.: Proc. Soc. Exp. Biol. & Med., 46:421:1941.cial Productsfor Nutritional 2. ANSBACHER, S., and LANDY, M.: Biotin and Scaly Dermatosis of the Chick. Pro;.... e . ~~~~Soc. Exp. Biol. & Med., 48:3;1941.Research" for additional in-formation on Vitamin-FreeCasein SMACO, prepareddiets for U.S.P. assays, crys- RESEARCH LABORATORIEStalline vitamins and other ... .. , . . ~~~~S. . A. C o~rpor at ionbiochemicals of nutritionalinterest. CHAGRIN FALLS, OHIO
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4 CEC-DETSMNT O.9,N.25
IT is reasonable to assume that an educated person
can evaluate current social and political trendsmore intelligently if he has some first hand familiaritywith pertinent biological data on the origin and rela-tionships of the human species, and the genetic basisof individual and racial differences. It becomes in-creasingly important to present to students the pointof view of the biologist towards man, his origin,differentiation into ethnic groups and his presentprospects.
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Courtesy American Museum of Natural History
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We invite correspondence and inquiries from inter-ested teachers.
4 SCIENCE-ADVERTISEMENTS VOL. 95, NO. 2459
FEBRUARY 13, 1942SCIENCE-ADVERTISEMENTS 5~~~~~
* In connection with the greatly increasingnumber of studies of nutritional problems,investigators have recognized the need forpure chemicals as the individual constituentsof basic diets, to eliminate difficulties causedby the introduction of unknown factors.The rapid progress of recent years in the
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Chemistry students at' Columbia Universityfind their lab measurements of pH and tempera-ture are greatly facilitated by the efficient ar-rangement of potentiometer equipment shownabove. Each of the four Type K-1 potentiom-eters is permanently connected to a standard cell,storage battery and galvanometer; the studenthas only to make his measurements and leave,without any checking of the circuit or signing upfor and returning of instruments.The potentiometers have the regulation two
ranges of the Type K-i, 01.61 volts and 0-0.161volt. Two are about thirty years old, and twoabout twenty; all are in "original" condition ex-cept for' new slidewires. Our Catalog E gives, onp. 40, the specifications of the modern K-1. Italso describes the K-2, which has a third rangeof 0-0.0161 volt.
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Scientific Events:The Fifth General HQspital (Harvard UniversityUnit), U. S. Army; The New National Astrophys-ical Observatory of Mexico; The Summer Sessionof New York Medical Schools; Awards for Achieve-ment in Aeronautics; Advisory Committee on Scien-
Scientific Notes and News ................. .......................... 166
Discussion:Insects as Carriers of Poliomyelitis Virus: PRO-FESSOR CHARLES T. BRuES. The Fruit Testing Co-operative: PHILIP M. WAGNER. Nicotinic Acid:PROFESSOR ROBERT F. GRIGS. Stomates?, Stig-mates, Stromates!: DR. PHILIP R. WHITE ........................ 169
Scientific Books:Statistieal Reasoning: PROFESSOR DUNHAM JACK-SON. Analytical Chemistry: PROFESSOR MARSTON
TAYLOR BOGERT ......... ................................. 172
Societies and Meetings:The Union of American Biological Societies: PRO-
A. BROWN, ............................................
Special Articles:The Procarcinogenic Effect of Biotin in ButterYellow Tumor Formation: DR. VINCENT DU VIa-NEAUD and OTHERS. Preliminary Observations on"Egg White Injury" in Man and Its Cure witha Biotin Concentrate: DR. V. P. SYDENSTRICKER
Scientific Apparatus and Laboratory Methods:Microburette: DR. P. F. SCHOLANDER. A Methodfor Determining the Concentration of PropyleneGlycol Vapor in Air: DR. THEODORE T. PUCK ...... 177
Science News 8
SCIENCE: A Weekly Journal devoted to the Advance-ment of Science, edited by J. MCKEEN CATTEIL and pub-lished every Friday by
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DROSOPHILA AND SPECIATION1By Dr. J. T. PATTERSON
PROFESSOR OF ZOOLOGY, UNIVERSITY OF TEXAS
ONE of the duties of the office of vice-president, ifnot the only one, is that of giving the address on theoccasion of the annual Zoologists' dinner. Examina-tion of a number of the papers which have been readby my predecessors in office shows that the speakerhas entire freedom in the selection of his subject andthe method of its presentation. The several addresseswhich were examined deal with various topics, withsome enlivened by much subtle humor and others re-
vealing evidence of serious efforts to plumb the depthsof the philosophy of biology. For me it seems saferto pursue a middle course.
1 Address of the retiring vice-president and chairman ofthe Section for the Zoological Sciences of the AmericanAssociation for the Advancement of Science, Dallas, Texas,December 30, 1941.
I have selected for discussion a subject which, al-though venerable, is still capable of holding the atten-tion of biologists. It is now more than eighty yearssince Charles Darwin posed the question of the originof species, but until recently we did not have experi-mental proof of the exact method by which a givenanimal species might have arisen among wild popu-lations. Following the appearance of Darwin's clas-sical work, and prior to the development of the mod-ern theory of Mendelian inheritance, most investi-gators were concerned with the problem of establish-ing the fact of evolution. They used largely thedescriptive methods of comparative anatomy, embry-ology, paleontology and taxonomy coupled withgeography. All this work was fundamental and im-
