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 100 Ibs. 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 Ibs. 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 corn-meal 

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



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

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

 mixed grain, 334i Ibs. 



j 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 Ibs. 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 Ibs. of growth on skim-milk and corn-meal, at 3.6 cts . 6. 12 



200-lb. pig cost $8.12 



which equals 4.06 cents per pound. 



HO-lb. pig, first cost $2.00 



170 Ibs. growth on corn-meal and middlings, at 5.2 cts . . 8.84 



200-lb. pig cost $10.84 



which equals 5.42 cents per pound. 



