SCIENCENEW SERIESVOL. 88, No. 2286 FRIDAY, OCTOBER 21, 1938 SUBSCRIPTION, $6.00
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THIS is why, in so many industries, spectrographic analysis issupplanting slower, and often less accurate, methods . . .and why,also, so many educational institutions are installing B & L Spectro-graphic Equipment. Students thus trained are better prepared forthe methods and tools industry will require them to use.
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ai4c 472AElntered as second-class matter July 18, 1923, at the Post Office at Lancaster, Pa., under the Act of March 3, 1879.
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2 S-E -D ERIE ET VO..8,No.28
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ARCHITECTUREOF THE fEART0HBy REGINALD ALDWORTH DALYSturgis Hooper Professor of Geology,Harvard University
HIS is a very readable account ofthe make-up of the earth which
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BOTANIC GARDENS OF THE WORLDMATERIALS FOR A HISTORY
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ECOLOGYAll Forms of Life in Relation to EnvironmentEstablished 1920. Quarterly. Official Publica-
tion of the Ecological Society of America. Sub-scription, $5 a year for complete volumes (Jan. toOct.). Parts of volumes at the single number rate.Back volumes, as available, $6 each. Single num-bers, $1.50 post free. Foreign postage: 40 cents.
GENETICSResearch in Heredity and Variation
Established 1916. Bi-monthly.Subscription, $6 a year for complete volumes
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Life, Heat, and AltitudeBy DAVID BRUCE DILL
In this fascinating book the author deals withlife in high temperatures and at great heights."A considerable amount of scientific and eventechnical information is presented, but the styleis so readable and there are so many interestingillustrative stories that the layman as well as thescientist will enjoy the book."-Science NewsLetter. "Recommended both for the technicalinformation presented and as an interesting ac-count of the living organism under stress."-Journal of the Aeronautical Sciences.
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2 SCIENCE-ADVERTISEMENTS VOL. 88, NO. 2286
SCIENCE-ADVERTISEMENTS
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VoL. 88, No. 22866
A Record of Sustained SuccessSMITH'S
ELEMENTS OF PHYSICSBy ALPHEUS W. SMITH
Professor of Physics, Ohio State University
New Fourth Edition
775 pages, 6 x 9, illustrated. $3.75Maintaining its position as a leading text in the field of elementary general physics, the new fourthedition of this eminently successful book has in the past five months been adopted by over fifty collegesand universities. Representative institutions in this rapidly growing list are:
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In this revision, as in earlier editions, a limited number of physical principles are presented in such a way as to en-courage students to form clear and distinct physical concepts and to develop a capacity for seeing relations betweenphysical principles. Many changes have been made to improve the presentation and to bring the material abreastof current developments. The problems have been entirely revised and rearranged.
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Sutton-DEMONSTRATION EXPERIMENTS IN PHYSICSEdited by RICHARD M. SUTTON, Haverford College. 545 pages, $4.50
Kennard-KINETIC THEORY OF GASESBy EARLE H. KENNARD, Cornell University. International Series in Physics. 483 pages,$5.00
Zemansky-HEAT AND THERMODYNAMICSBy MARK W. ZEMANSKY, College of the City of New York. 381 pages, $4.00
Kemble-FUNDAMENTAL PRINCIPLES OF QUANTUM MECHANICSBy EDWIN C. KEMBLE, Harvard University. International Series in Physics. 611 pages,$6.00
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OCTOBER. 21, 1938 SCIENCE-ADVERTISEMENTS 7
OCTOBER 21, 1938 SCIENCE-ADVERTISEMENTS
BIOLOGICAL MATERIALS
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