A Study of Growth 23 



at 30° C. was fed a corresponding amount. The initial average 

 weight and the percentage increments were as follows: 



Set £1 . 

 Set E= . 



This shows that the rate of growth of the animals at the two 

 temperatures for the amount of beef was more than enough in 

 both cases to preserve equilibrium, and even to add to the body 

 weight. 



The individual records of three animals from each set were 

 as follows: 



S5T E^ (table XXIv) SET E' (tABLE XXv) 



In. vjt. Increment In. wt. Increment 



grams per cent grams per cent 



No. (3) male 1-507 47.1 No. (3) female 1.172 57.4 



No. (2) male 1-527 53 .05 No. (2) male i .539 22.8 



No. (i) male 2.307 31 .1 No. (i) male 2.805 ^°-5 



During the period of ten weeks Nos. i in Set E^ and Set E^ 

 were fed 38 and 40 times respectively (105 mg. of beef each 

 time); No. 2 in Set E^ was fed 42 times; No. 2 in Set E^ 30 times; 

 No. 3 in Set E^ 45 times; No. 3 Set E^ 45 times. 



With the exception of No. 3 in Set E-, the results show the 

 same relative percentages as did the averages taken from the 

 entire sets, viz: the gain was greater at the room temperature. 

 No. 3 of Set E^ was a female of small initial weight; this fact 

 as interpreted in the light of the data cited above will not be 

 difficult to explain. Lastly, Set F (Table XXVI), at 30° C. was 

 fed as much beef and as often as the individuals would take, regard- 

 less of amount given to other sets. It was found, however, that 

 this set ate about the same amount as Set E^ (Table XXIV), 

 and Set E^ (Table XXV); and this may be considered the maxi- 

 mum amount of food that can be taken. The initial weight and 

 the percentage increment for the period often weeks was as follows : 



Initial weight (grams) i . 66 1 



Increment (per cent) 25 .06 



