50 AGRICULTURAL EXPERIMENT STATION. [Jan. 



So far as one is able to judge from the data presented, 

 these rations, other things l)eing equal, were not sufficient 

 for cows of 1,000 pounds live weight that had had calves 

 but a short time previous to the experiment, and yielding 

 12 to 15 quarts of millv daily. They should apparently have 

 received at least 3 pounds more of total digestible organic 

 matter daily. This insufficient food would of itself have had 

 a tendency to produce a poor quality of milk. In the corn 

 and cob meal ration the protein supply was quite low, and it 

 is surprising that the animals did not shrink more than 9 per 

 cent, in their yield of milk on the basis of 12 per cent, solids 

 below the sugar-meal ration. The milk of Ration I. shows 

 the effect not only of lack of protein but of lack of sufficient 

 food as well. In the sugar-meal ration the replacing of a 

 pound of carbohydrates by a pound of protein is seen in the 

 increase of the solid matter, and especially of the amount of 

 fat. The weight of the animals at the bes-innino; and end 

 of the periods (21 days) is not given, but it is stated that 

 " the variations were not greater than usually appear in the 

 live weight of such animals, and did not surely indicate gain 

 or loss." 



It hardly seems possible to the writer that animals fresh 



