GENETICS: MACDOWELL AND VICARI 
579 
In this report the males alone have been considered. As the corre- 
sponding females were used for breeding, the frequent pregnancies 
rendered it extremely difficult to estimate the normal weights at the 
specified ages. Moreover, the females are less satisfactory for this 
study since during the times they were nursing their young the alcohol 
treatment was suspended, although during pregnancy up to the time 
for the young to be born, they did receive the alcohol. 
The reduction in the number of young born to alcoholic parents is 
even more striking than the loss in weight. The figures in table 2 show 
that, while 29 pairs of normal rats produced 300 young, 30 pairs of 
alcoholic rats produced in the same time 108 young. The summaries 
for the four lines all show a similar decrease in fecundity of the alcoholics 
as compared with the normals as is shown in the grand total. 
The discussion and a more critical analysis of these results will be 
reserved for an extended account at a later date. 
TABLE 1 
Average Weights (in Grams) of Alcoholized Male Rats Compared with Their 
Normal Brothers 
AGE IN DAYS 
ALCOHOLICS 
NORMALS 
DIFFERENCES IN 
BODY WEIGHT 
Number of 
individuals 
Average body 
weight 
Number of 
individuals 
Average body- 
weight 
grains 
grams 
30 
27 
46.2 
22 
45.4 
0.8 
40 
27 
70.5 
22 
74.5 
4.0 
60 
27 
116.1 
22 
128.7 
12.6 
90 
26 
142.3 
22 
174.9 
32.6 
120 
22 
192.5 
21 
239.8 
47.3 
151 
16 
211.7 
18 
267.0 
55.3 
182 
10 
227.1 
13 
285.0 
57.9 
TABLE 2 
Fecundity Records of Alcoholic Rats Compared with Normal Rats; Matings of 
Alcoholics and the Corresponding Normals Made on the Same Day, and the 
Record of Births Taken During Equal Periods 
NUMBER OF PAIRS 
NUMBER OF 
YOUNG BORN 
GROUP 
Alcoholics 
Ncrmals 
Alcoholics 
Normals 
A 
10 
10 
23 
75 
B 
4 
3 
13 
31 
C 
7 
8 
30 
81 
KC 
9 
8 
42 
113 
Total 
30 
29 
108 
300 
