Cost of Milk Production. 89 



also to note that the four pounds of grain ration per day cost just as 

 much as the pasture at thirty cents per week; in other words the addi- 

 tion of a grain ration doubled the cost of keeping the cows for that 

 month. 



In regard to the dry matter consumed, it was found impracticable to 

 make any estimate of the dry matter consumed in the pasture, so that 

 the figures of the dry matter consumed are based upon what the 

 animals ate during the months of winter feeding, namely, November, 

 December, January, February, March and April, and are given in 

 Table XII. The percentages of dry matter in the various foods were 

 taken from Jenkin's and Winton's Compilation of Analyses of Ameri- 

 can Feeding Stuffs (U. S. Dept. Agr., Experiment Station Bulletin No. 

 11) and are as follows: 



Per cent 

 dry matter. 



Clover hay 88.63 



Corn silage 20.90 



Mangels 9.10 



Wheat bran . 88.10 



Corn meal 85 . 00 



Cotton-seed meal 91 . 80 



Corn stalks 59 . 90 



Oats 89 . 00 



In this table and in the averages computed ]from it those months 

 have been omitted in which the cow was dry for the whole or part of 

 the time, and the figures therefore relate only to the milk given and 

 the food consumed during the time that the milk was given without 

 reference to the food consumed when the animal was dry. 



12 



