FARM CONDITIONS 155 



is found as follows, when the test is made once in two 

 weeks : Add the daily yields of milk for the day of 

 the test and for one week before and one week after 

 the test, thus obtaining the milk yield for 15 days. 

 Multiply this sum by the per cent, of fat found on the 

 day of the test and the result is the fat yield for half 

 a month. This added to the next half month gives the 

 yield of fat for the month. 



The monthly yields of milk and fat, added together 

 at the end of the period of lactation, give the total 

 yields for the period. 



APPLICATION OF RESULTS OF TESTING INDI- 

 VIDUAL COWS 



A progressive dairyman will discard from his herd 

 any animal that can not produce, at least, 200 pounds 

 of milk-fat in a year, especially if the milk is sold on 

 the basis of its fat content ; and he will aim, by means 

 of intelligent breeding, feeding and care, to increase 

 the annual yield of milk-fat to 250 or 300 pounds for 

 each cow. 



TESTING CREAM ON THE FARM 



There are several conditions under which it is of 

 advantage to test cream on the farm in order to know 

 its fat content. 



When a dairyman is producing cream to sell directly 

 to consumers, it is important to know its percentage 

 of fat, in order that it may be uniform from day to 

 day, whatever the desired percentage may be. The 

 work of the cream-separator may be controlled ad- 



