33 



but 3.2 pounds during the third week, the total amount of milk con- 

 sumed during this period was 10.58 pounds. The skim milk ration 

 was gradually increased to 13.8 pounds, the amount fed daily during 

 the last week of the test, and 15 pounds was the largest daily amount 

 received by any one of the ten calves. 



The economic rearing of calves on milk depends, largely, upon 

 the continuous use of skim milk, thereby reducing the amount of 

 whole milk needed. The average daily amount of whole milk con- 

 sumed per calf by the ten calves reported in Table XV is .72 pound 

 per day, which, for the six months included in this experiment, is 

 equivalent to 131 pounds per head. 



Jersey heifer No. 202 consumed the largest amount of whole 

 milk of any of the calves in Lot I, or approximately 165 pounds 

 for the period. The birth weight of this calf was 55 pounds or 6.7 

 pounds below the average for the lot. The gain in live weight made 

 by calf No. 202 was not in proportion to the amount of whole milk 

 consumed as there were but two calves in the lot that showed a lower 

 gain in body weight. The minimum amount of whole milk re- 

 quired by any one of the ten calves was .543 pound per day, 

 amounting to 98.8 pounds for the period of 182 days. The maxi- 

 mum gain in live weight produced by any one of the ten calves in 

 this lot was made by a calf which consumed approximately, the same 

 amount of whole milk as was consumed by the average individual 

 receiving milk. The amount of skim milk consumed per head by 

 the calves in Lot I was ii.n pounds per day. The total amount of 

 skim milk consumed per head for the entire period was 2022 pounds, 

 making the total 2153 pounds of milk including the whole milk. 

 Calf No. 19 consumed 13.54 pounds of skim milk per day, or 2.43 

 pounds more than the average for the lot. This calf ranks second 

 from the standpoint of total gain and is the most expensive from 

 the standpoint of total cost. It required 442.26 pounds more skim 

 milk to make the gains for calf No. 19 than for the average for the 

 lot. The minimum amount of skim milk was consumed by calf 

 No. 17, the daily amount required being 9.19 pounds or 1.92 pounds 

 less than that required by the average for the lot. An interesting 

 fact concerning the development of this calf is that it made the 

 greatest average daily gain and ranks low from the standpoint of 

 cost for the entire period. The amount of skim milk required by 

 calf No. 17 was 349.44 pounds less than that for the average of 

 the lot. The calf which consumed an amount of skim milk equal 

 to the average for the lot ranks lowest in total gain. 



The calves receiving the skim milk ration began to consume the 

 dry mash during the second week, although in very small amounts. 

 During the thirteenth week, they were receiving slightly over one 

 pound per head per day and at the completion of the test, they were 

 consuming 1.6 pounds per day. Out of the lot of ten calves, but one 

 was eating a measurable amount of dry mash at two weeks of age. 



