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SCIENC 



New Sekiss 



Vol. XLIX, No. 1264 



Friday, March 21, 1919 



SmoLB Copies, V6 (^ 



Whetzel's History of Phytopathology 



Professor Whetzel divides his subject into Five Eras, and these in turn into Periods. He 

 gives a general survey of each Era and each Period, crj-stallizes the evohitionary move- 

 ment of each, gives interesting biographic sketches of the predominant figures, frequently 

 including portraits. 



12mo of 130 pages. By Herbebt Rice Whstjsl. Professor of Plant '.Pathology ' at Cornell University, 

 Ithaca, New York. Cloth, J1.7o net. 



Prentiss and Arey's Embryology ^^,K(.,/)^/>/r/o.v 



This work has been extensively revised and entirely reset. The actual descriptions have 

 been reset and rearranged, a new chapter on the morphogenesis of the skeleton and muscles 

 has been included. 



Large octavo of 411 pages, with 33S iUastratioos. By Chahlbs W. PRErmss, Ph.D., formerly Professor of 

 Microscopic Anatomy, and Leslib B. Arev. Ph.D., Associate ,Professor of Anatomy, Northwestern Uni- 

 versity. 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 /or himself. 



12mo of SI pages. By Leslie B. Abet, Pa. D., Associate Professor of Anatomy, Northwestern Uuiveraity. 



,Clotn, tl.OO neu 



Fred's Soil Bacteriology 



The exercises described in this book are arranged^primarily for students of soil bacteriology, 

 boil chemistry and physics, and plant pathology. As far as possible the experiments are 

 splanned to give guanlilalive results. 



12mo of 170 pages, illustrated. By E. B. Fas d. Ph.D., Associate Professor of Agricultural Bacteriology; 

 College of Agriculture, University of Wisconsin. Cloth, $1.25 net 



A^EIK (jd) EDITION. 



Lusk's Science of Nutrition 



Professor Luak 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 /undawien/o/s upon which a scientific andoeneficial dietary regimen may be 

 built. Important chapters are those on food economics, war raliont, food requirements for 

 various occupations. 



Lusk's Food in War Time 



Here you have a practical exposition of the science oi 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. Nutntive values of every-day articles of food are given. 



BylGBAHAU LcsK. Ph.D. 40 pages. Cloth. SO cenu net 



W. B. SAUNDERS COMPANY, Philadelphia and London 



