384 



Feeds and 



until each cow was consuming about 2 lbs. daily, this allowance being 

 continued for several weeks. The table gives the results with 1 cow : 



Effect of feeding tallow on milk and fat production. 



It will be seen that the first effect of feeding tallow to the cow was 

 to increase the percentage of fat in the milk so that it was richer by 

 0.6 of 1 per ct. on the fourth week of the trial. There was a smaller 

 flow of milk, however, so the total increase of fat was insignificant. 

 With some of the cows there was practically no change. 



After feeding stearin and cotton-seed-, palm-, corn-, cocoanut-, and 

 oleo-oil to cows, Woods of the New Hampshire Station concluded 

 that the first effect of such feeding is to increase the percentage of 

 fat in the milk, but on continuing such feeding the milk tends to re- 

 turn to its normal condition. Woods holds that the increase in fat 

 is not due to the oils, but to the unnatural character of the food. 

 Hills of the Vermont Station^ found oil emulsions, at best, no more 

 effective than unemulsified oils. 



607. Effects of drought.— Van Slyke of the New York (Geneva) 

 Station,^ studying the milk supply of cheese factories during a 

 drought, found that the general effect was to rapidly diminish the 

 flow of milk. The fat increased, while the casein, and especially the 

 albumin, diminished. Tho percentagely small, the changes were in 

 the direction of giving the milk the appearance of having been 

 watered — a point of importance with milk inspectors. 



608. Turning to pasture. — The Copenhagen (Denmark) Station^ 

 for 10 successive years studied the changes in milk when turning cows 

 from winter stables to spring pastures. In all 1,961 fall-calving cows 



Ept. 1899. 



' Bill. 68. 



■ Ept. 45 ; Woll, Wis. Expt. Sta., Bui. 116. 



