6 
BULLETIN 1069, U. S. DEPARTMENT OF AGRICULTURE. 
yearly butter fat production was 251 pounds, or about that of the 
average association cow, had an average income of $57.82 over cost 
of feed, or more than twice as much. Income over cost of feed per 
cow is what remains for labor, miscellaneous expenses, and profits. 
$ MO 
!30 
/SO 
//O 
too 
j 90 
ao 
\ 
\ 
) SO 
» so 
/o 
-/o 
SO /OO /SO 200 250 300 3SO 400 4SO SOO 
POUNP5 OF BUTTEPFAT PER COPY 
Fig. 3. — Relation between butterfat production and income over cost of feed. 
Figure 3 shows in graphic form the relation of butterfat produc- 
tion to income over cost of feed as recorded for the larger groups in 
Table 2. 
