20 



Ada Springer 



By comparing the five males it will be found that, while all 

 have consumed approximately the same amount of beef, the 

 percentage increments vary considerably. Taking the extremes, 

 Nos. 3 and 2, it appears that while both have eaten about the 

 same amount of beef, yet the percentage increment of the first, 

 the initial weight being 1.948 gram, was twice that of the second, 

 whose initial weight was 3.098 grams. Between these extremes 

 there are inconsistencies, yet in general the same relation holds. 



A similar comparison between the five females (Table XIX) 

 shows the same relation. In Nos. 5 and 3, where the initial 

 weights were 1.68 and 2.515 grams respectively, the amount of 

 beef was approximately the same; yet the percentage increment in 

 the first case was 20.5, and in the second 10.4. These results 

 are in accordance with those for the period often weeks, and show 

 that with increase of initial weight there is a decrease in percentage 

 increment. 



In connection with these general results it should be noted that 

 in Tables XVII and XVIII there are weekly variations for which 

 the factors considered cannot account. 



Set C (Table XX) was composed of seven individuals consider- 

 ably below the average in length and in weight. Because of 

 their small size it may be assumed that they are younger indivi- 

 duals. They took pieces of beef thesame size (105 mg.) as did the 

 average ones, with the exception of two, which after two weeks 

 ate practically nothing; this makes the percentage increment 

 somewhat lower than it would have been had all eaten the normal 

 amount. The average initial weight of the set was 0.91 gram, 

 and after a period of six weeks the percentage increment was 



