16 BULLETIN 763, U. S. DEPARTMENT OF AGRICULTURE. 
famous dairy farms. If there be any good dairy farms or herds in 
the district, apply to the owner for photographs of his cows and farm. 
If possible, make local photographs of the profit-making cows and 
the nonpayers and mount them together with their records on the 
same card. 
Home projects.—Project A will be well nearing completion when 
the dairy herd is culled and selected. A good type of project will 
be to weigh, test, record, and make comparisons between cost and 
production to be in position to discard the cow that does not pay a 
profit. 
A SAN/TARY 
ANDO PRACTICAL 
3 DAIRY BARN. 
MAXIMUM PRO- 
DUCTION MAV BE 
EXPECTED HERE. 
Fic. 9.—A good type of dairy barn. 
Correlations.—Compute the value of the dairy cows of the district. 
Make an estimate of the value of the milk produced in one month. 
Compare the purchase price of a good dairy cow with the net 
value of her milk production for a year; estimate the percentage of 
profit she pays on the investment. 
Make out a written report on the different breeds of dairy cattle | 
in the district. Locate the original homes of these breeds. On a 
map of the United States locate the chief dairy sections, and find 
out, if possible, the prevailing type of dairy cattle in each section. 
What noted dairy herds in your State? What breeds are they ? 
