22 ARON. 



Table 12. — Weights and measurements of dogs A and B. 



Weight in grams 



Length from nose to atlas 



Length from nose to os coccygis 

 Length from nose to end of tail 



Distance from ear to ear 



Circumference of head 



Circumference of neck 



Circumference of chest 



Circumference of abdomen 



Length of fore leg 



Length of hind leg 



Height from ground 



Dog A. 



355th day. 



2,450 



Cm. 

 16.0 

 54.0 

 71.0 

 8.0 

 23.5 

 15.5 

 28.0 

 2L0 

 25.0 

 3L0 

 29.5 



500th day. 



5,440 



Cm. 

 16.0 

 55.5 

 74.0 

 9.4 

 26.5 

 23.0 

 39.5 

 34.0 

 26.0 

 31.0 

 31.5 



DogB. 



355th day. 



6,850 



Cm. 

 18.0 

 66.0 

 88.0 

 11.4 

 28.5 

 27.0 

 43.0 

 33.0 

 34.0 

 37.5 

 35.5 



500th day. 



7,400 



Cm. 

 18.2 

 66.0 

 89.0 

 11.5 

 29.0 

 28.0 

 47.0 

 37.0 

 34.5 

 37.5 

 36.0 



On the five hundredth day, as compared witli the three hundred and 

 fiftieth, the aspect of dog A had changed entirely. Tlie slender, emaciated 

 animal had become an overfattened but dwarfed dog. Photographs of 

 both A and B were taken on the five hundred and first day. (See Plates 

 III and IV. ) It is apparent that dog A, in spite of the ample diet given 

 during the last five months, had lost the "tendency to grow." However, 

 because of the ample food which had been given to it, it was able to store 

 up fat, thus increasing in weight and thickness, but not in size. 



It having been proved that dog A had lost its normal capability of 

 growing, it was decided to finish the experiment by killing and analyzing 

 both animals. This was done on the five hundred and fifth and five 

 hundred and sixth day for A and B, respectively. The autopsies showed 

 no remarkable features, except a great amount of fat in dog A, the 

 subcutaneous layer as well as the muscular and mesenteric fat being 

 considerably greater in amount than that of its normal brother B. The 

 weights of the organs and the bones, selected as usual, were determined. 

 (Table 13.) 



