SCIENCE 



New Series TTdttiav Ttttv 1 1Q91 Single Copies, 15 Cts. 



Vol. LIV, No. 1383 TKIUAY, V LY 1, IWiSl ..^.nnual Subsckiption, S6.00 



SAUNDERS' BCiHKS 



Boyd's Preventive Medicine I New work 



Five groups of diseases are considered whose etiology warrants their classifi\ g preventable. 



These are diseases resulting from the invasion of micro-organisms; the rest( ?< ty, deficient 



diet; the result of unhygienic or insanitary conditions of employment; the ri. ^^ 'e puerperal 



state; and those transmitted from patient to offspring. These diseases are ^ t causes of 

 morbidity. ■?; 



Octavo of 352 pages, with 135 illustrations. By Mark F. Boyd, M.D., M.Si ^ ' Professor 

 of Bacteriology and Preventive Medicine, the Medical Department of the U\ '^^.-tyof Texas. 

 Cloth, $4.00 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 Officer engages; his relation to boards of health, physicians, 

 social agencies, and the public; the scientific principles upon which preventive medicine is founded. 

 Octavo of 512 pages, illustrated. By Fr.^nk Overton, M.D., D.P.H., Sanitary Supervisor, 

 New Yorlc State Department 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 Stephen W. Ranson, M.D., 

 Professor of Anatomy, Northwestern University Medical School, Chicago. Cloth, $6.50 net. 



Smith's Bacterial Diseases of Plants New work 



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

 tion. 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 Profe.ssor 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 688 pages, illustrated. Cloth, $10.00 net. 



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



Please send me the books 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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