SCIENCE 



New Sebies 

 Vol. LII, No. 1335 



Friday, July 30, 1920 



Single Copies, 16 Cts. 

 Annual Subscription, $6.00 



'fe.^ 



JUST OUT 



•X to the food resources 



'mary and secondary 



-:h forni as to make 



d in this country. 



■_ ■'od to the total 



'tional import- 



Pearl's The Nation's FooaV \ 



Dr. Pearl's book constitutes a definite piece of statistical reset. X^ 



of the United States. It gives a critical survey of the productio. *«>, 



food materials separately, then combines the two and puts the ma ■'jk 



possible certain general conclusions regarding the total production oi ' / 



Then is considered the proportionate contribution as primary and s < 



nutritional production; the relation of production to population; there 



ance of the production of different commodity groups, and single comm. ^ -a consideration 



of the relative nutritional importance of the production of individual commv tfcies used as human 



food; the human food materials which come into this country in the way of imports; relative 



proportion of the total nutritional intake furnished by the several commodity classes. 



By Raymond Peabl, Ph.D., Sc.D., LL.D., Professor of Biochemistry and Vital Statistics, Johns Hopkins University. 



Octavo of 374 pages, with charts. Cloth, J3.5o 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 

 iundameniah upon which a "scientific and beneficial dietary regimen may be built. Important 

 chapters are those on food economics, food requirements for various occupations. 

 Octavo of 64o pages. By Graham Lusk, Ph.D., Professor of Physiology, Cornell Medical School. Cloth, $6.oo net. 



McFarland's Biology 



NEW {4th) 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, muti- 

 lation and regeneration, grafting, senescence, etc. 



13 mo. of 45? P 

 sity of Pennsyli 



RECENT 



Barton's Teaching the Sick 



Dr. Barton's book is based on personal experience. In it he tells you not only what to teach the 

 sick, but how to teach them — how to lead the patient from the most simple exercise to the plan- 

 ning and construction of buildings in the open. 



SIGN AND MAIL THIS OBDEB FOBM TODAY 



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



{Pearl's Th« Nation's Food • - $3.50 net "t 

 McFiTrfa'^iS^Blllolir'''": : «:son:.'[ and charge to my account 

 Barton's Teaefainc the Sick • - $1.50 net J 



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