600 



THE AMERICAN NATURALIST 



[Vol. LI 



the alcohol mice 2 grains. In that case the alcohol was 

 given in the food and water and apparently had a fat- 

 tening effect. None of those animals were handled except 

 for weighing them. 



Records of the Young of Each Female 

 A record was kept of the young of each female. Many 

 of the young in each of the lines were eaten by their par- 

 ents. Tables III to VIII show the number of months each 

 female was carried; the number of litters each had; the 

 total number of young born, and the number that died ap- 

 parently from lack of vitality. 



TABLE III 



Eecord op the Young of Each Female Control Line 



TABLE IV 



Male Alcohol Line 



