SCIENCE 



41921 J 



New Series 



Vol. LHI, No. 1370 



Friday. April 1. 1921 



Single Copies, 16 Cts. 

 Annual Subscription, 86.00 



Saunders' Booli 



5 ■* -^ 



SI ' fl 



Boyd's Preventive Medicine I '^''■•'' 



Five groups of diseases are considered whose etiology warrants their class ^ as 



preTentable. These are diseases resulting from the invasion of micro-orga >* the 



result of faulty, deficient diet; the result of unhygienic or insanitary coi o of 



employment; the result of the puerperal state; and those transmitted from, '-^ to 

 offspring. These diseases are important causes of morbidity. % 

 Octavo of 352 pages, with 135 illustrations. By Mark F. Boyd, M.D., M.S., C.P.H., Professor of BactUiology and 

 Preventive Medicine, the Medical Department of the University of Texas. Cloth, 64.00 net. 



Overton and Denno's The Health Officer 



This book contains the information the average Health Officer must have in order to 

 discharge his duties. It tells him what to do, how to do it, and why he should do It. 

 It describes the various activities in which a Health Oflicer engages; his relation to 

 boards of health, physicians, social agencies, and the public; the scientific principles 

 upon which preventive medicine is founded. 



Octavo of S12 pages, illustrated. By Frank Overton, M.D., D.P.H., Sanitary Supervisor, New York State Depart- 

 ment of Health; and Willard J. Denno, M.D., D.P.H., Medical Director, Standard Oil Company. Cloth, $5.50 net. 



Ranson's Anatomy of the Nervous System New work 



Dr. Ranson presents his subject from the dynamic rather than the static point of view — 

 that is, he lays emphasis on the developmental and functional significance of structure. 

 The reader is led at the very beginning of his neurologic studies to think of the nervous 

 system in terms of its relation to the rest of the living organism. 



Octavo of 395 pages, with 260 illustrations, some in colors. By Stephbn W. Eanson, M.D., Professor of Anatomy 

 Northwestern University Medical School, Chicago. Cloth, 86,50 net. 



Smith's Bacterial Diseases of Plants "ew work 



This book is the result of thirty-five years of reading and diligent laboratory and field 

 investigation. More than most books it is the product of experiment. It is largely the 

 product of a single laboratory, eight of the organisms here selected for special study 

 having been named by the author. It is in a sense, a review of Professor Smith's work 

 in this field. 



By Erwin F. Smith, in charge of Laboratory of Plant Pathology, Bureau of Plant Industry, Washington, D. C. 

 Octavo of 6S8 pages, illustrated. Cloth, 810.00 net. 



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W. B. SAUNDERS COMPANY,West Washington Sq.,Phila. 



Please send me the booki marked (X), charging the amount to my account : 



Boyd's Preventive Medicine $ 4.00 net 



Overton and Denno's The Health Officer. 5.50 net 



Ranson's Anatomy of the Nervous System . 6.50 net 



Smith's Bacterial Diseases of Plants . . . 10.00 net 



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