VARIATION OF FAT IN MILK. 67 



TABLE BY GURLER, SHOWING RECORDS OF INDIVIDUAL Cows. 



In making the calculations in the above table the price of 

 butter per pound was taken as 20 cents, the skimmed milk 

 was considered to be worth 25 cents per hundred pounds, and 

 the cost of labor was taken at $12.50 per cow. 



Breed of Cows. There is a marked difference in the milk 

 secreted by different breeds of cows. The most striking differ- 

 ence is, perhaps, between the Holstein and the Jersey breeds. 

 The former, as a rule, yields a large quantity of milk, with a 

 comparatively low fat-content; the latter, as a rule, yields 

 a comparatively small quantity of milk, with a high per- 

 centage of fat. The influence of individuality of 'cows must 

 not be overlooked in this connection. 



It is said that the color of the skin, and of the fine hairs on 

 the exterior of the cow's udder may be taken as a guide in 

 selecting cows for breeding purposes. A fine soft skin, darkish 

 golden yellow in color, enveloping the milk -glands, and covered 

 with fine soft hair, are considered indications of rich milk. 

 While the Jersey cows perhaps yield milk with a higher fat- 



