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PHYSIOLOGY 



(a) Bio-chemistry. See References. 



Food intake. For obvious reasons general statements concern- 

 ing the food intake are unsatisfactory, but the following cita- 

 tions will serve to give some idea of the weight of food consumed 

 under various conditions. 



For growing rats, weighing about 40 grams at the beginning 

 of the test, and about 80 grams at the end, and fed several 

 different diets, each with and without milk, Hopkins ( 7 12) 

 reports the daily consumption of calories as given in table 107. 



TABLE 109 

 Group A (Controls') Kojima ('17 c). All the weights given are in grams 



M. = lean meat; R = rusks. 



From weeks I-VI they were fed with "melox"; during weeks VII and VIII 

 with lean meat (60 per cent) and rusks (40 per cent). 



Osborne and Mendel ('15 a) report as shown in table 108 the 

 rate of food intake in grams per week of male rats fed with edestin 

 or casein plus protein-free milk, (1) without butter-fat (2) plus 

 butter-fat. Each gram has a value of about five calories. 



In table 109 are given the data from Kojima ('17 c) for rats 

 weighing about 200 grams. 



The data in table 108 show a consumption of about 7 grams 

 per diem for a rat of 100 grams body weight and McCollum (MS.) 

 reports the same. At 200 grams the intake is from 11 grams, 

 table 108, to 14 grams, table 109. The relative weight of the 



