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SCIENCE 
New, SERIES SINGLE Copies, 15 OTs. 
Vou, XLVIT* No. 1227 Fripay, JULY 5, 1918 ANNUAL SUBSCRIPTION, $5.00 
Y 
Whetzel’s History of Phytopathology 3s 
OUT 
Professor Whetzel divides his subject into five Zras, and these in turn into Periods. He 
gives a general survey of each era and each period, crystallizes the evolutionary movement 
of each, gives interesting biographic sketches of the predominant figures, frequently includ- 
ing portraits. 
12mo of 130 pages. By Hersent Hich WuHETzEt, Professor [of Plant Pathology at Cornell University, 
Ithaca, New York. Cloth, $1.75 net. 
Prentiss and Arey’s Embryology yew gs zo:ri0w 
This work has been extensively revised andfentirely reset. The actual descriptions have 
been reset and rearranged, a‘new chapter on the morphogenesis of the skeleton and mus- 
cles has been included. 
Large octavofof 1411 pages, with 388 illustrations. By CaaRuesiW. Prentiss, Pu.D., formerly Professor of 
Mictoscopic Anatomy, and Leste B. AREY, Pu.D., Associate Professor of Anatomy, Northwestern Univer- 
sity. Cloth, $4.00 net. 
Arey’s Laboratory Histology 
Professor Arey treats his subject strictly on an induction basis. He leads ‘the student to 
scrutinize, explain, and_reach conclusions for himself. 
12mo-0f 81 pages. By Lesue B. Arey,!Pu.D.,‘Associate Professor of Anatomy, Northwestern University. 
Cloth, $1.00 net. 
Fred’s Soil Bacteriology 
The exercises described in this book are arranged primarily for students of soil bacteriology, 
soil chemistry and physics, and plant pathology. 4s far as possible the experiments are 
planned to give quantitative results. 
12mo of 170 pages, illustrated. By E. B. Frep, Pa.D.,’ Associate?{Professor of’ Agricultural Bacteriology, 
College of Agriculture, University of Wisconsin, Cloth, $1.25_net. 
Lusk’s Science of Nutrition kit! ee 
Professor” Lusk points out why certain diseases are due to metabolic derangements. He 
teaches you how to correct these derangements. He gives you the very foundation of 
dietetics—the fundamentals upon which a scientific and beneficial dietary regimen may be 
built. Important chapters are those_on food economics, war rations, food requirements for 
various occupations. 
Octavo'of 640 pages. By Granam Lusk, Px.D., Professor of Physiology, Cornell Medical Bohol: «50 a 
Lusk’s Food in War Time 1 eae 
Here you have'a practical exposition of the science of nutrition as applied;to the daily'menu. 
You are shown how to conserve the food supply, and at the same time_preserve efficiency 
and health. Nutritive values of every-day articles of food are given. 
By Granam Lusx, Pa.D. 46 pages. Cloth, 50 cents net. 
W. B. SAUNDERS COMPANY Philadelphia and London 
