EFFECTS OF DRUGS ON WHITE MICE 139 
EFFECTS ON FECUNDITY OF THE ADULTS AND VIABILITY OF THE 
YOUNG 
A record was kept of the litters of each female. Many of the 
young in all the lines were eaten. In the tables 1 to 13 only 
those young that died from lack of vitality are recorded. 
TABLE 1 
Record of the young of each female 
Control line. First generation 
FEMALE | NUMBER OF | NUMBER OF | NUMBER OF NUMBER OF YOUNG 
| MONTHS OBSERVED LITTERS | YOUNG BORN | THAT DIED 
oes i ; | 
\e ee ee ee 7 3 | 18 | 0 
Soo oe eee ii 2 | 12 | 0 
CP esc o i 2 | 16 | 0 
OY 3s Beas eee ae 7 2 | A | 0 
TO, 8 ee a 3 1 | 7 | 0 
Bee | 
Total 4 | 7 10 | 60 0 
i} 
* Female E died at the end of three months. No pathological condition Conia be 
found. 
t Female F was killed by accident at the beginning of the experiments. 
TABLE 2 
Alcohol line. First generation 
| NUMBER OF NUMBER OF 
NUMBER OF NUMBER OF YOUNG 
gH uEe | MONTHS OBSERVED LITTERS | YOUNG BORN THAT DIED 
| f= kt ee et aaa . 
Neat ise) 2 7 2 17 1 
Sere Neer ‘4 2 | 12 1 
CSS eh) | 7 4 | 23 1 
1D eee i 4 | 15 2 
I AR 3 A. | "6 2 | 14 4 
F*, 
Motale sas. 5) i 14 | 81 | 9 
1 34 wks. | 
| 
* Female F died three and a half weeks after the experiments were started. No 
pathological conditions could be found. 
