3 o8 



Bulletin 39. 



believes that in building up or maintaining a dairy herd enough 

 is involved to make it profitable for the dairyman to know what 

 his cows are doing and not to be satisfied with estimates. Any 

 method which does not involve the weighing and testing of all 

 the milk is a method of estimating and not of determining the 

 value of his cows. 



Many dairymen who have never tested any of the cows of 

 their herds think they know which are the best ones, usually 

 judging by the amount of milk given or the supposed richness of 

 the milk. To such and to others it will be interesting to note th^ 

 ranking of the cows of these herds according to cash returns, rich- 

 ness of milk, and amount of milk given in the following table, 

 which shows that the most profitable cow stood twentieth in rich- 

 ness of milk and third in amount of milk and so on. The cows 

 are numbered in this, as in all the tables, in the order of their 

 true value as shown by the amount of butter fat produced. 



TABLE IV. — SHOWING RANK OP COWS ACCORDING TO REAL 

 VALUE, RICHNESS OP MILK AND AMOUNT OP MILK. 



