206 CHARLES B. STOCKARD AND GEORGE N. PAPANICOLAOU 



The fourteen male animals are in no sense selected ; they are all 

 of the normal males in our series of animals between the num- 

 bers 613 and 1909 which have been mated with both normal and 

 alcoholic females. The record numbers of these males are 665, 

 666, 667, 669, 670, 676, 677, 679, 681, 682, 683, 854, 914, and 

 1052. The fourteen males, as the table shows, have been 

 mated in all eighty times. The fifteen females recorded include 

 also every normal female among the animals considered in this 

 paper that has been paired with both normal and alcoholic males. 

 The record numbers of the females are 645, 646, 650, 652, 657, 

 661, 662, 671, 674, 675, 703, 722, 760, 890, and 1043. These have 

 been mated in all forty-nine times. 



There has been no selection or choice in mating these animals 

 or in estimating the results, since it was only decided to arrange 

 such a table after beginning the present study of the data. 



The first column of table 9 shows the results of thirty-six 

 matings of the normal males with normal females. Two of the 

 thirty-six matings failed to produce results, or 5.55 per cent, 

 and the remaining thirty-four matings gave rise to eighty-six 

 young. Sixty-five, or 75.59 per cent, of these lived to reach 

 maturity, while 24.41 per cent died within three months. None 

 of the eighty-six offspring showed any gross structural defects. 



When these same normal males were mated forty-four times 

 with alcoholic females, the second column shows that four mat- 

 ings failed, or 9.09 per cent, almost twice as many as the failures 

 with normal females. The forty successful matings produced 

 one hundred offspring, only fifty-eight of which were capable of 

 survival to maturity. Thus 42 per cent of the young animals 

 died within three months against only 24.41 per cent of those 

 from the normal mothers and same fathers. Six per cent of the 

 young from the alcoholic mothers possessed noticeable structural 

 defects. 



In every respect the matings of the fourteen normal males 

 produced greatly superior results when paired with normal fe- 

 males, as compared with their records by alcoholic females. 

 The numbers are comparatively small, but the differences are 

 large and the inferior records are consistently in the same column. 



