^<J,ourdii IMS?7^ 



New Series 



VOL. LIV, No. 1396 



Friday, September 30, 1921 



Single Copies, 15 Cts. 

 Annual Subsceiptios, $6,00 



Smith's Bacterial Diseases of "^^ \nts 



This book is the result of thirty-five years of reading and a, p laboratory and field investiga- 

 tion. More than most books it is the product of experiri, ^ ^ It is largely the product of a 

 single laboratory, eight of the organisms here selected for s,% °, itudy having been named by 

 the author. It is in a sense, a review of Professor Smith's w ^ tg ';his field. 



By Erwin F. Smith, in charge of Laboratory of Plant Pathology, Burei'Ji '^ ^nt Industry, Washington, D. C. 

 Octavo of 688 pages, illustrated. \ ^ "& Cloth, $10.00 net. 





Whetzel's History of Phytopath^| ^y 



Professor Whetzel divides his subject into five Eras, and these' f-'g into Periods. He gives 

 a general survey of each Era and each Period, crystallizes the e\ a ^j ary movement of each, 

 gives interesting biographic sketches of the predominant figures, \ 9^ ^ tly including portraits. 

 12mo of 130 pages. By Herbert Rice Whetzel, Professor of Plant Pathology ^ <^ ^11 University. Ithaca, New 

 York. Cloth, $2.00 net. 



Prentiss and Arey*s Embryology Third Edition 



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 412 pages, with 388 illustrations. By Charles W. Prentiss, Ph.D., formerly Professor of Micro- 

 scopic Anatomy, and Leslie B. Arey, Ph.D., Professor of Microscopic Anatomy, Northwestern University. , 



Fred's Soil Bacteriology 



Cloth, $5.50 net. 



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

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

 to give quantitative results. 



12mo of 170 pages, illustrated. By E. B. Fred, Ph.D., Associate Professor of Agricultural Bacteriology, College of 

 Agriculture, University of Wisconsin. Cloth, $1.50 net. 



Lusk's Science of Nutrition 



Third Edition 



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, food requirements for various occupations, etc. 

 Octavo of 640 pages. By Graham Lusk, Ph.D., Professor of Physiology, Cornell Medical School, Cloth, $6.50 net. 



McFarland's Biology 



Fourth Edition 



This work takes up Living Substance generally. There are chapters on the cell, reproduction, 

 ontogenesis, conformity to type, divergence, structural and blood relationship, parasitism, 

 mutilation and regeneration, grafting, senescence, etc. 



12mo of 457 pages, illustrated. By Joseph McFarland, M.D., Professor of Pathology and Bacteriology, University 

 of Pennsylvania. Cloth, $2.50 net. 



W. B. SAUNDERS COMPANY, ^''"'"^''^ ^t„do„ 



