Butter Fat Per Cent. 
a 2 Jd H 
5 6. Vi 8 a 
Month of Lactation. 
MONTHLY BUTTER-FAT PERCENTAGES 
Graphs showing monthly butter-fat percentages of crossbred cows and their parents. The signifi- 
cance of the lines is the same as in Fig. 24 on the opposite page. (Fig. 25.) 
