18 AMERICAN DAIRYING. 



at each milking and a sample added to the 

 composite jar from each milking. This test 

 should be made at about the end of three 

 months, as that will give an average of the 

 first six months. When a cow is to be judged 

 on a single test there is need of some thoughi 

 and good judgment — more than when she is 

 judged on three tests at intervals or on monthly 

 tests. We will suppose a cow is fresh Jan. 1 

 and is tested April 1. This will give a fair 

 basis on which to judge her if she has had uni- 

 . form feed and care. But if she is fresh March 

 1 and tested June 1 we shall secure too high a 

 basis on which to judge her as she will be 

 judged at her highest point of production, for 

 she will produce more milk and butter June 1 ■ 

 on pasture than she would May 1 on dry feed; 

 in fact more than she would at any previous 

 or subsequent time. 



We will suppose a cow gives 154 lbs. of milk 

 in seven days and it tests 4.3 per cent of fat. 

 This will make 6.612 lbs. of butter-fat in the 

 seven days. To this we will add one-eighth for 

 increase of butter over fat and we have 7.72 lbs. 

 of butter in seven days, or 1.1 lbs. per day. This 

 we will multiply by 252, the number of days in 

 8.4 months, and we have 277 lbs. of butter for 

 the cow's yearly work. 



A better way. — I would recommend this plan 

 of testing only to those who will not take the 



