THE DAIRY BREEDS OF CATTLE 265 



nearly six months. The Jerseys not only gave over forty 

 pounds of milk per day, but the milk was the richest of 

 any in butter-fat, averaging 4.7 per cent, or an average 

 of more than two pounds of butter per day for each cow, 

 making a total of 274 pounds in 120 days. In the two 

 months in which they were milked prior to the beginning 

 of the test, they should have produced about the same 

 amount of butter in proportion to the time as they had 

 during the test, which would give an average for each cow 

 for six months of 410^ pounds of butter. When it is 

 remembered that the average dairy cow gives less than 

 250 pounds of butter per year, these accomplishments seem 

 all the more remarkable. These results were obtained 

 without withdrawing a single cow because of sickness. 

 They were fed on a profitable basis, each cow earning 

 over cost of feed nearly $40, or a daily profit of 43 cents. 



It is interesting to compare results during the first and 

 last part of the test for the purpose of showing the per- 

 sistency of production and endurance. During the first 

 ten days of the test, the Jerseys gave 10,942 pounds of 

 milk, or an average to a cow a day of 43.8 pounds ; aver- 

 age per cent of fat in the milk, 4.25 ; total pounds of fat, 

 466, or an average to a cow a day of 1.86 pounds. During 

 the last ten days they gave 9382 pounds of milk, an aver- 

 age of 37.5 pounds to a cow; average per cent of fat in 

 the milk, 5.13; total amount of fat, 481.1 pounds, or an 

 average to a cow each day of 1.92 pounds. While the cows 

 decreased in flow of milk, they increased both in percent- 

 age and amount of fat, and a general improvement in the 

 productive capacity of the Jerseys is indicated by a com- 

 parison of the two tests. 



Subsequent records show that the milking capacity of 

 the Jersey is being developed, without detriment to the 



