SCIENCE 



OCT 4 1S20 



New Sebies 

 Vol. Ln, No. 1344 



Friday, October 1, 1920 



Single Copies, 15 Cts. 

 Annual Subsokiption, $6.00 



Pearl's The Nation's Food 







I JUST OUT 



Si 



£. to the food resources 



'' mary and secondary 



ch form as to make 



lod in this country. 



7 food to the total 



'Utritional import- 



— a consideration 



s used as human 



mports; relative 



—i-y classes. 



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

 Octavo of a74 pages, with charts. Cloth, S3.6o net. 



Dr. Pearl's book constitutes a definite piece of statistical research j, 

 of the United States. It gives a critical survey of the production \ \ 

 food materials separately, then combines the two and puts the mat • 

 possible certain general conclusions regarding the total production of 3 

 Then is considered the proportionate contribution as primary and '% 

 nutritional production; the relation of production to population; the ^ 

 tmce of the production of different commodity groups and single coi ji 

 of the relative nutritional importance of the production of individual ct % 

 food; the human food materials which come into this country in tht "J 

 proportion of the total nutritional intake furnished by the several i % 



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 

 fundamenlals 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 640 pages. By Graham Lusk, Ph.D., Professor of Physiology, Cornell Medical School. Cloth, $6.00 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, muti- 

 lation and regeneration, grafting, senescence, etc. 



xamo of 457 pages, illvistrated. By Joseph McFahland, M.D., Professor of Pathology and Bacteriology, Univer- 

 sity of Pennsylvania. Cloth, $2,5o net. 



RECENT 



Barton's Teaching the Sick 



Dr. Barton's book is based on personal experience. In it he tells you not only whal 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. 

 By Geobgb Edward Barton, A.I.A., Consolation House, New York, zamo of i63 pages, illustrated. 



Cloth, $i.5o net. 



SIGN AND MAIL THIS OKDEK FORM TODAY 



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



e Pearl't Tha Nation'^ Food - - $3.50 net '\ 



Please send me i^-Fl'rUndrBfoIo^t"'''" T l tUl^A and charge to my account 



J McFarland's BiologT ■ - $2.50 Bat f 



^ Barton't Teaching the Sick - - $1.50 net J 



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