104 AGRICULTURAL EXPERIMENT STATION. [Jan. 



from 2.84 to 3.38 parts of non-nitrogenous food constituents ; 

 and in case of that of the skim-milk, one of the former to 

 from 2.50 to 2.90 of the hitter; the variations being mainly 

 due to the difference in the amount of solid matter in the 

 two kinds of milk. 



In the second feeding experiment (1885), the relative pro- 

 portion between skim-milk or buttermilk and corn meal was 

 different from that in the first one. During the first period 

 of the second experiment, only two ounces of corn meal were 

 added to each quart of milk required to satisfy the animal. 

 As soon, however, as from six to seven quarts per head 

 were consumed daily, four ounces of corn meal were fed for 

 every quart of milk. Another increase in corn meal was 

 made when ten quarts of milk were called for; and again, 

 when twelve quarts were consumed per head. The experi- 

 ment closed with a daily average ration per head of from ten 

 to twelve quarts of milk, and from eighty to ninetj^-six 

 ounces of corn meal. In consequence of this course of feed- 

 ing, the nutritive character of the daily diet was changed 

 from time to time. The periodical increase of corn meal in 

 the daily fodder rations caused the introduction of a larger 

 proportion of non-nitrogenous food constituents, as starch, 

 sugar, fat, etc., in the diet, than of nitrogenous constituents. 

 The experiment began with a diet which contained one part 

 of digestil)le nitro2:enous constituents to 2.7 of non-nitroo- 

 cnous food constituents, and closed with 1:5 in case of 

 skim-milk and 1 : 4.5 in case of buttermilk. 



The expiration of a contract with a creamery in our 

 vicinity deprived us, at that stage of our investigation, of a 

 lil)eral supply of buttermilk. A limited supply of home- 

 made skim-milk necessitated a modification of our feeding 

 system, in case that at least six pigs should be engaged in 

 the experiments at one time. It was therefore decided to 

 feed the skim-milk from our herd of six cows, in equal quan- 

 tities, to six growing pigs, and to supply the additional feed 

 from other suitable sources, including corn meal in part. 

 It seemed also of interest to learn whether the particular 

 course i)ursued in the previously descril)ed experiments of 

 feeding skim-milk from the home dairy with corn meal alone 

 could be improved on ; and, if so, in what direction. Gluten 



