No. 591] TRANSMISSION OF DEGENERACY 



159 



males are based on exactly the same kind of data and are 

 to be fully compared. Eight and one tenth per cent, of 

 the males died, while only 4.34 per cent., proportionately 

 about half as many, females died. Not one grossly de- 

 formed animal was found among the offspring of alco- 

 holized females. 



Thus from the mortality records the sons of alcoholized 

 mothers appear more affected than their daughters. And 

 taken as a whole the records of the alcoholized mothers 

 are superior in quality to those of the alcoholized fathers, 

 thus indicating that the male germ cells are more injured 

 by the treatment than the female germ cells. 



The third section shows the records of the male and fe- 

 male descendants from alcoholized grandfathers on the 

 father's side. Here the mortality record of the males is 

 much better than that of the females; 27.77 per cent, of 

 the males died soon after birth, and 39.47 per cent., a 

 very much higher proportion of the females, died. 



The mortality of these animals from alcoholic grand- 

 parents seems much greater than that of animals from 

 treated parents ; this is due, however, to the fact that the 

 sex of many more of these that died at birth was ascer- 

 tained as they occurred later in the experiment when this 

 point was being watched. The totals are the only figures 

 in the horizontal mortality columns that are to be com- 

 pared. The total mortality of descendants from alco- 

 holic grandfathers on the father's side was 51 per cent., 

 which is higher than the mortality of the offspring trom 

 alcoholized mothers, 42.85 per cent., but lower than the 

 mortality of offspring from alcoholized fathers, which 

 reached 55.41 per cent. . 



Among the ascertained male descendants from an alco- 

 holized paternal grandfather 8.33 per cent showed gross 

 deformities, while 10.52 per cent, of the descendants as- 

 certained to be female were deformed. Considering all 

 the animals in this gronp, 7 per cent, were deformed 

 which is almost twice as great a proportion as occurred 

 among the offspring of alcoholized fathers. The deform- 



