DEPARTMENT OF EXPERIMENTAL EVOLUTION. 



113 



Table 3. — Average weights {in grams) of the second-generation alcoholized male rats compared 

 with their normal double first cousins. 



Age. 



Alcoholics. 



No. of 

 individuals. 



Average 

 body-weight. 



Normals. 



No. of 

 individuals. 



Average 

 body-weight. 



Differences. 



Normals 



heavier 



by— 



30 days 



40 days 



60 days 



90 days 



120 days 



151 days 



182 days 



212 days 



243 days 



15 

 15 

 15 

 14 

 14 

 13 

 10 

 8 

 6 



firm. 

 57.20 

 83.37 

 129.20 

 161.93 

 201.00 

 212.00 

 248 . 20 

 256.12 

 271.83 



16 

 16 

 16 

 16 

 14 

 14 

 13 

 13 

 9 



gm. 

 52.65 

 81.72 

 132.94 

 172.47 

 218.29 

 242.71 

 265.00 

 277.31 

 287.11 



gm. 



- 4.55 



- 1.65 

 + 3.74 



10.54 

 17.29 

 30.71 

 16.80 

 21.19 

 15.28 



Table 4. — Fertility records of the second-generation alcoholized rats compared with the controls. 



Matings of the alcoholics (A) and corresponding normals (N) were made at the same age 

 and the records of births taken dm-ing equal periods. 



Table 5. — Second-generation offspring (from alcoholized parents). 



Fertility record of non-alcohohc trained offspring (A) of alcohohc parents, compared 

 with corresponding trained normals (N); matings of the two sets were made at the 

 same age and the records of births taken during equal periods. 



