14 
Impress upon pupils (1) the need of records and tests; (2) the 
importance of studying the records, drawing comparisons and 
striking balances, with the final end in view of determining whether 
the dairy cow in question is worthy of her keep. 
How many cows in the district whose records are being kept ? How 
many farms that keep dairy cows ? Are the pupils keeping records 
at home ? What organizations among the local dairy farmers ? 
Suggest the organization of a cow-testing association. 
Practical exercises. — Comparative charts showing the standing of 
two or more cows in milk production, pounds of butter fat and cost 
of feed, may be made by the pupils, using data they have obtained 
#£COffD rOf? OA/£ Y£#/?. 
&(/rr£7?&4T /<?Z.77££S. 
^urrrfF/Yir^/z.z&iBs, 
Fig. 7. — Contrasting types of dairy cows. 
from their own work in preceding lessons. Problems on costs, pro- 
duction, profits, and losses should be constructed, the aim of this 
lesson being to impress forcibly the need of knowing what the dairy 
cow is really doing, thereby eliminating the unprofitable cow, or 
having an opportunity to develop the profitable one. (Fig. 7.) 
LESSON VII. JUDGING AND PURCHASING. 
Sources of information. — Farmers' Bulletins 355, 743, and 893. 
Department Bulletin 434. 
Topics for study. — The unprofitable cow being discovered, the 
problem now is one of discarding the nonpayer and purchasing the 
profit-making cow. 
