no TOKUYASU KUDO 



(lurinii tlu' ('lii<)ni(^-thirst series a loss of 10.3 per cent. Since the 

 corresponding loss in the body weight is much greater, the skele- 

 ton increased correspondingly in relative weight during the 

 experiments. 



The cartilaginous skeleton similarly shows a loss in average 

 weight of 11.8 per cent in the acute- thirst series and 5 per cent 

 in the chronic-thirst series. (The apparent loss of 34.1 per cent 

 in the skeleton of rat Si. 2, on total inanition (table 1), is due to 

 an error in technique.) 



The data for the humerus (2) and femur (2) show a loss in 

 average weight of 21.1 per cent in the acute-thirst series and 12.1 

 per cent in the chronic-thirst series. This indicates that the loss 

 in these large bones is relatively greater than in the remainder of 

 the skeleton. 



Jackson ('15) found that in albino rats during acute and chronic 

 inanition (with water) there is apparently little or no loss of 

 weight in the skeleton, and cited numerous data showing similar 

 results by other investigators in various species. 



Falck and Scheffer ('54), in a dog on dry diet, found a loss of 

 20.7 per cent in body weight and a loss of 5.3 per cent in the 

 ligamentous skeleton. In the acute thirst, caused by experi- 

 mental diarrhea in dogs, Tobler ('10) found a loss of 4 to 15 per 

 cent in the weight of the (cartilaginous?) skeleton. Thus it is 

 evident that during inanition, either with or without water, the 

 skeleton decreases but slightly in weight. 



Musculature 



The musculature in the acute-thirst series shows a loss in aver- 

 age weight of 33.1 per cent and in the chronic-thirst series a loss 

 of 61.2 per cent (table 2). 



The corresponding percentage losses in body weight and in 

 musculature found by previous observers as a result of thirst are 

 as follows: in the pigeon (Schuchardt, '47), body —43.9, muscu- 

 lature -37; in the dog (Falck and Scheffer, '54), body -20.7; 

 musculature —29.3. 



During inanition with water, Jackson ('15) observed the fol- 

 lowing percentage losses in body weight and weight of muscula- 



