18 



ARON. 



weights increased from 760 to 950, and from 732 to 866 grams, re- 

 spectively. Number XIV was given about 75 calories. On this diet 

 its weight remained practically stationary. The animal became thinner 

 and weaker from day to day and died from emaciation and weakness 

 on the ninty-flrst day of the experiment. The body was not analyzed 

 chemically because it was thought at the time that the composition of 

 the starved animal would be of no special interest. 



Number XI after the first twenty days received 90 calories, then 95, 

 and finally 100 calories, and its body weight increased from about 

 950 to 1,150 grams. This dog presented ' the same picture as number 

 VI of the first experiment, for it became thinner and taller during 

 the entire period. It was killed on the one hundred and thirty-sixth 

 day and analyzed. (Tables 10 and 11.) 



Dog number VIII, the lightest at the beginning of the experiment, 

 was given an ample supply of food and during one hundred and forty-five 

 days increased from 600 to 2,350 grams. Dog number XII, weighing 

 850 grams at the beginning, received the equivalent of but a few more 

 calories, but its weight nearly reached 3,000 grams in one hundred and 

 forty days. Both animals were analyzed and a study of table number 

 11 reveals the interesting fact that dog number VIII had a much greater 

 tendency to put on fat, while the muscles of number XIII increased 

 markedly in weight. This is explained by the fact that number VIII was 

 • of a smaller breed than number XII. 



Table 10, Experimentt III. — Composition of dogs VIII, XI, and XII. 





Dog XI (1,100 

 grams live weight). 



Dog VIII (2.375 

 grams live weight). 



Dog XII (3,000 

 grams live weight). 



Weight. 



Per cent 

 of live 

 weight. 



Weight. 



Per cent 

 of live 

 weight. 



Weight. 



Per cent 

 of live 

 weight. 





Grams. 

 48 

 10 

 11 

 2 

 24 

 102 



45 





Grams. 

 88 

 21 

 19 

 5 

 27 

 159 



89 





Grams. 

 78 

 21 

 26 

 7 

 24 

 223 



85 





Heart 

















Spleen . 









Kidneys -_ 









Digestive tract 



Remaining internal 

 organs _ _ 













Total internal 

 organs 



Brain 









242 



22.0 



408 



17.2 



465 



15.5 



49 

 645 

 134 



66 



23 



4.5 

 58.6 

 12.2 



6.0 



48 



1,413 



309 



138 



107 



2.0 

 59.5 

 13.0 



5.9 



57 



1,946 



294 



197 



198 



2.9 

 64.8 



9.8 

 .6.6 



Bodv 



Skin 



Blood 



Content of stomach 

 and intestines by- 

 difference 











