Be, BULLETIN 1121, U. S. DEPARTMENT OF AGRICULTURE. 
while CG is no better than the second generation crossbreds. It is 
not safe to conclude that the selection for weight has had any effect. 
The birth weights of the young raised in the inbred families and in 
Experiments C0, CC, C1, and B are compared for each size of litter 
PLEA CLV T 
9 
Fie. 12.—The birth weight of the young raised to 33 days, 1916-1919. Indices correcting for effects of 
size of litter and seasonal conditions (Table 2). (See Fig. 8 for explanation of symbols.) 
in Figure 22. The great effect of size of litter on birth weight is 
illustrated. Otherwise the conclusions are the same as those drawn 
from the indices. 
20 
S 
FER CENT 
Le) 
i 
S 
20 
Fig. 13.—The rate of gain between birth and 33 days, 1916-1919. Indices correcting for effects of size 
of litter and seasonal conditions (Table 2). (See Fig. 8 for explanation of symbols.) 
DAILY GAINS. 
We have seen that the results for birth weight are similar to those 
for percentage born alive. The results for daily gain between birth 
and weaning (Fig. 13) are, on the other hand, more like those for 
