28 Ada Springer 



in an equal number of cases the initial weight before the injury 

 was less than in the intact sets. The percentage increment in 

 the majority of cases, however, was greater in the injured sets. 

 This would seem to indicate that the greater percentage increment 

 in the injured sets was not due alone to a smaller initial weight 

 before the tails were cut. It must be remembered, however, that 

 after the tails had been cut off the weight in the injured sets in 

 every case was less than that of the intact sets. It would seem 

 to follow that the greater rate of growth in the injured sets was 

 connected with the decrease in the volume, by removal of the 

 tails. There is another relation to be considered, viz: whether 

 the condition of the tissues themselves play a role or whether the 

 result depends simply on relative volume, that is, whether there 

 is any difference between two animals of the same weight, one 

 having been a large animal when its weight was reduced by cutting 

 off the tail, the other an intact smaller animal. The data are 

 nsufficient upon which to base a conclusion. 



The following table shows four sets that were starved for a 

 period of five weeks, after which time they were fed 153 mg. of 

 beef per week; also four sets as controls which had been fed for 

 five weeks, after which they were also fed 153 mg. of beef per 

 week. The initial weights and the percentage increments were 

 as follows: 



After fz^e weeks' starving After five weeks of feeding 



In. wt. 

 grams 



Set H^ (Table IX) 1.65 



Set Fi» (Table X) 1.345 



Set F'b (Table X) 1.359 



Set psb (Table XI) 1.056 



The four sets after starvation gained faster than did the sets 

 after a period of feeding. Set B^ (Table II) was starved for 

 seventeen weeks, after which it was fed 153 mg. of beef a week for 

 a period of nine weeks. When the percentage or rate of growth 

 is compared with that of normal sets, A^ and A^ (Table I), for an 

 equivalent period, the result is as follows: 



