598 



THE AMEBIC AN NATURALIST [Vol. LI 



of the mice not treated with alcohol was 22.4 grams and 

 of those treated with alcohol 21.8 grams. 



TABLE I 

 Those Not Given Alcohol 

















I I ti 





9.3 





t ! ti 







Tables I and II give the average gain of the different 

 lines for four months and for seven months. The mice 

 that did not receive alcohol gained more than those that 

 were treated ; the former gaining 4.6 grams on an average 

 for four months and the latter 3.9 grarbs ; in seven months 

 the untreated mice gained 7.2 grams and the alcoholized 

 3.8 grams. 



It is possible that the handling of the mice and the extra 

 exercise they took in the excitement of being alcoholized 

 might account in part for their growing less than 

 treated mice. In the 1911 experiments the conti 

 carried 7 months gained only 2 grams on an average^ 

 the alcohol mice gained 6 grams ; in the second general 

 carried four months the controls gained 1 gram each 



:he extra 



;oholized . .-^^ 



