SKIM-MILK. 131 



makes it much more reliable and valuable than 

 if it covered a short time. I use Prof. Whit- 

 cher's conclusions entire: 



1. For each JOOlbs. of live weight eight pounds of skim- 

 milk and four pounds of corn-meal make an. ample and well- 

 proportioned daily ration. 



2. In the absence of skim-milk two and one-half pounds of 

 corn-meal, two and one-half pounds of middlings, and eight 

 pounds of water will give an equal amount of nutritive 

 matter. 



3. One hundred pounds of digestible matter in the skim- 

 milk and corn-meal ration was equal to 146.9 lbs. in the corn- 

 meal and middlings ration. 



4. The superiority of the skim-milk ration is due in part, 

 doubtless, to its greater digestibility; but still more, in my 

 opinion, to the fact that there is less waste matter — that is 

 indigestible matter — to be carried through the system, and to 

 the noticeable difference in the character of the dung, men- 

 tioned by Prof. Morse in "Part II" of this bulletin. The 

 pigs on mixed grain invariably grew constipated, while 

 those on skim-milk were not so affected. 



5. The cost of a pound of gain on skim-milk and oorn-meal 

 was 3.6 cents, on mixed grain ration, 5.2 cents. 



6. Digestible dry matter required to produce 100 lbs. of 

 gain of live weight on skim-milk and corn-meal, 231 lbs., on 

 mixed grain, 334i lbs. 



I- ( Lot 1 when dressed shrunk 19.6 per cent. 

 ■ j Lot 2 when dressed shrunk 18.4 per cent. 

 8. Calling skim-milk worth 25 cents per 100 lbs. and we 

 get the following balance sheet, on the basis of the cost as 

 given in " Conclusion No. 5 ": 



30-lb. pig, first cost $2.00 



170 lbs. of growth on skim-milk and corn-meal, at 3.6 cts . 6.12 



20a-lb. pig cost $8.12 



which equals 4.06 cents per pound. 



30-lb. pig, first cost , $2.00 



170 lbs. growth on corn-meal and middlings, at 6.2 cts . . 8.84 



200-lb. pig cost $10.84 



which equals 6.42 cents per pound. 



