298 AGRICULTURE FOR COMMON SCHOOLS 



phuric acid is also a sign of colostrum. Physicians in cities 

 say that many children die every year owing to the colostrum 

 in milk furnished by dairymen. 



Abnormal Milk. — Salty milk is sometimes obtained from 

 cows. Its cause is not clearly known, but as a cure the cow 

 should be dried off, that is, be allowed to stop giving milk. 

 Bloody milk may be due to an injured condition of the udder, 

 or it may be due to certain bacteria which develop after the 

 milk has been drawn. Blue milk, yellow milk, ropy milk, 

 and bitter milk are all due to certain germs which may get 

 into milk after it is drawn and cause these various conditions. 

 Bitter milk is sometimes also caused by food which the cow 

 has eaten. Milk from a sick cow, or one in any way not in 

 perfect health, should never be used for human food. 



