The uniform efficiency of the skim milk ration is shown by the 

 fact 'that six of the ten individual calves in Lot I maintained the 

 same ratio in weight at birth to weight at six months of age. The 

 average daily gain in live weight for the lot receiving the skim 

 milk ration was 1.21 pounds. The largest average daily gain made 

 by any one of the ten calves in Lot I was 1.49 pounds or .28 pound 

 above the average for the lot. The poorest daily gain made by 

 any of the calves receiving the skim milk ration was .89 pound or 

 .32 pound below the average for the lot. The average weights at 

 the end of the various weeks during the experiment show con- 

 siderable variation. The average weekly gain during the first five 

 weeks was six pounds or 2.45 pounds below the average gain made 

 during the next four weeks. After the ninth week, the gain in 

 live weight showed a decided increase, continuing until the eighteenth 

 week. From the eighteenth to the twentieth weeks, the gain in weight 

 was consistent but not as great as during the period included between 

 the tenth and eighteenth weeks. The highest average gain cover- 

 ing a period of four weeks was 10.35 pounds which was made 

 during the last month of the experiment and the highest weekly 

 gain was 11.5 pounds, made during the twenty-sixth week. The 

 lowest weekly average gain in live weight was 4.7 pounds made 

 during the fourth week of the test. The largest weekly gain made 

 by any individual calf in Lot I was 26 pounds, produced during the 

 twenty-third week. The average maximum weekly gain yielded by 

 the lot was 19.3 pounds. One calf increased but 10 pounds in weight 

 during its best week which represent the minimum gain for the lot in 

 this particular. It is worthy of notice, however, that this calf yielded 

 this amount of gain during four of the twenty-six weeks. Four of 

 the ten calves in Lot I lost in weight during one or more weeks, six 

 calves maintained a standard weight during one week and two 

 gained an average of 2.0 pounds during their poorest week. The 

 total loss in weight for all calves receiving the skim milk ration was 

 19 pounds or an average of 4.75 pounds per calf for those that 

 lost in weight. The losses occurred in various periods of develop- 

 ment, the exact weeks being as follows : first, third, fourth, tenth 

 and twenty-third. The large number of the calves that retained a 

 standard weight for two weeks is rather singular. In comparing the 

 gains in live weight produced the week previous and the week sub- 

 sequent to the period during which the calves failed to gain, it shows 

 that the average weekly gain produced previous to the week that 

 losses occurred was n.i pounds as compared with 10.5 pounds for 

 the week immediately following. ' 



COST OF RATION RECEIVED B Y LOT I. The successful feeding of 

 live stock requires that the gains in live weight be economically 

 produced. The feed cost per pound gain for all the calves in Lot 

 I averaged 5.7 cents, the extremes being- 7.5 cents as the maximum 

 and 4.3 cents as the minimum. In comparing the total cost with the 



