40 



There is on the average a decrease in the " solids not fat '" 

 in lot I., compared with Experiment A, but it is still 

 superior to lot II., whose milk remains unaltered in this 

 respect. It is obvious that the influence of the food on the 

 " solids not fat " in the milk is very slight, and the effect of 

 change in other conditions is, apparently, as little. 



The live-weight of the cows. The cows were weighed 

 monthly throughout the summer trials as during the winter 

 experiment. Table IX. shows the average weight at the end 

 of each month. 



TABLE IX. AVERAGE LIVE-WEIGHT PER COW FOR EACH LOT 



(INLB.) 



It will be observed that in both experiments each lot 

 gained on the average in live-weight, and the greater 

 increase follows the heavier ration of concentrated food. Not 

 unnaturally, the increase was greater in both lots in the 

 summer than in the winter, the gain in live-weight in lot I. 

 during the summer trials being somewhat striking. The 

 results in this connection seem to indicate that a heavy ration, 

 although it may not pay for itself always in an increased 

 milk yield, or in an improvement in the yield of butter, may, 

 nevertheless, be advantageous when it is desired to sell the 

 cows to the butcher at the end of the lactation period as is 

 frequently done. 



It is interesting to note that the total gain in live-weight 

 per cow from February 10 to August 24 was nearly the same 

 in both lots, the total food received being also nearly the 

 same. 



