310 The Journal of Heredity 
Milk Yield (Pounds) 
1 2 3 % 5 6 7 8 9 70 W eo 4% 
Month of Lactation. 
r MILK PRODUCTION OF CROSSBRED COWS AND THEIR PARENTS 
These graphs represent the milk production, by months and pounds, of crossbred cows Nos. 1 
to 16 and their parents. The number of the crossbred is in the upper right hand corner of each 
set of graphs. The crossbred is represented by the solid line in each case, the dam by the dotted 
line, and the sire by the dot-and-dash line. (Fig. 14.) 
