60 



lU'LLKTIN 173. 



the per cent of fat not only ceased to increase, but fell back to the 

 same point as before the oil was fed. 



Ramm and Winthrop"^ made a comparison of some new feeding 

 stuffs using five cows for six months. The foods were corn bran, 

 cocoa-molasses (hot molasses and finely ground cocoa shells), blood 

 molasses (blood, molasses and refusal of cereals) and molasses distil- 

 lery refuse (residue from manufacture of alcohol from beet molasses). 

 They found a wide fluctuation in the fat content of the milk during 

 different periods and believed that the molasses increased the fat 

 content wherever it was fed, \vhile the corn bran seemed to reduce 

 the fat content. When feeding rations rich in fat they could see no 

 relation between the fat content of the ration and the fat content 

 of the milk. 



Hagemann + conducted some experiments to determine whether a 

 fat rich fodder produces a fat rich milk. During five periods, vary- 

 ing in length from 21 to 35 days, he fed two cows on rations contain- 

 ing from 175 to 720 grams of fat. In addition to a basal ration the 

 grains added were corn meal, linseed-oil meal, malt sprouts and peanut 

 cake mixed with cocoa molasses. In the sixth period of seven days he 

 gave 1.1 pounds of sesame oil to each cow daily as an emulsion in drink- 

 ing water. He concludes that " the proportional and absolute fat con- 

 tent of milk is not dependent upon the amount of fat in the food." 



We have now reviewed the reports of forty-four separate experi- 

 ments. They may be classified in the following manner in answer 

 to the question : Was the percentage of fat in the milk increased by 

 the food given the cows ? 



Feeding fat 



Feeding protein and mixed foods 

 Feeding watery foods ........ 



Feeding molasses preparations . . 



Total 



A tendency 

 to increase. 



1 

 3 



*]Mileh Zeitung 27 (1898), p. 513. 



f Landwirtschaftliche Jahrbucher 28 (1899), p. 485. 



