72 BIGGLE SWINE BOOK. 



In reference to the amount of skim-milk that can 

 be assimilated by a pig per day, I quote pretty good 

 authority in saying that in case of animals under 100 

 pounds in weight the amount under no circumstances 

 can exceed twelve pounds. 



This amount of milk would seem to be enough for 

 any hog, even a large one, on theoretical grounds, 

 for in twelve pounds of skim-milk there is over a third 

 of a pound of digestible protein, and protein constitutes 

 only a comparatively small percentage of the weight 

 of pork. The protein in a side of pork, with lard and 

 other fats included, is less than eight per cent. 



It therefore appears that the protein needed to 

 build up a pound or a pound and a half of pork, the 

 maximum growth of a pig in a day, cannot be more 

 than the digestible protein in twelve pounds of skim- 

 milk : and it is usual to feed something in addition to 

 the skim-milk, which of course increases the amount 

 of protein in the daily ration. 



In this chapter I introduce analyses of a number 

 of feeding stuffs, arranged in tabular form, for use in 

 making up rations. Fuller data will be found in all 

 the recent Yearbooks of the U. S. Department of 

 Agriculture. The separation of the foods into nitro- 

 genous and carbonaceous groups is arbitrary, and 

 merely offered for convenience, as there is no sharp 

 dividing line. Wheat bran, middlings and shorts, for 

 instance, though here classed as nitrogenous foods, 

 are quite rich in carbonaceous elements also. If these 

 tables help emphasize the facts that skim-milk is a 

 highly nitrogenous food and that corn is a highly car- 

 bonaceous food, they will be useful. 



