276 RAYMOND PEARL 



should be random ones and there is every reason to believe that 

 they were. If anyone, however, hesitates to accept them as 

 such or feels that a greater accm^acy necessarily inheres in 

 unsampled material he should confine his consideration of the 

 ■growth results to ages under 200 days. 



From the data in tables 11 to 13 and figures 2 and 3 the fol- 

 lowing points appear to be well established : 



1. The offspring of alcoholized parents, whatever the nature 

 of the mating, showed a higher mean adult body weight than 

 offspring of untreated parents of the same breeds mated in the 

 same way. This is true of both sexes. 



2. In the case of the male chickens there was no substantial 

 difference in the rate of growth in the three lots until after an 

 age of about 100 days was passed. From that point on the 

 male offspring of treated d" d" X untreated and treated 9 9 

 grew at a more rapid rate than the controls. The differences 

 in mean body weight for a given age became increasingly large 

 as the age advanced. At 200 days of age we have, by inter- 

 polation on the curves, the following set of comparative mean 

 body weights. 



Comparative mean body weights at 200 days of age 



Absolute weight Relative weight 



Males ex untreated d" d' X untreated 9 9 2392..32 gram 100 



Males ex treated cfcf X untreated 9 9 2668.97 gram 112 



Males ex treated cr' a" X treated 9 9 2815.25 gram 118 



3. In the case of the female chickens there was no substantial 

 difference in the rate of growth in the three lots until after an 

 age of about 150 days was passed. During the next 25 days 

 the controls grew faster than the chicks from treated parents. 

 At and after 200 days of age, however, the offspring of treated 

 parents (one and both) showed a higher mean body weight than 

 the controls. We have the following set- of comparative mean 

 body weights at 250 days of age, obtained by interpolation on 

 the curves. 



