last nafmed date lot i weighed 963^ pounds, while lot 2 weighed 

 106 pounds. 



PLAN OF THE FEEDING WORK. 



To place the two lots on as equal a basis as possible it was 

 decided that each should be fed a like amount of digestible mat- 

 ter daily, that is, the total amount of digestible albuminoids and 

 non-albuminoids in the two rations should be as nearly alike as 

 possible, but in one case the source of this digestible matter should 

 be skim milk and corn meal, while in the other it should be com 

 meal and middlings, with water added. Of course the only pos- 

 sible basis upon which to compute such rations was the " feed- 

 ing standards" and "feeding tables," and to utilize these it was 

 necessary to assume that the skim-miik, corn meal and mid- 

 dlings were to be of average quality and digestibility. Luckily, 

 subsequent analyses of the foods used, and determination of di- 

 gestibility, did not show enough variation to affect the results ia 

 any way. 



The amount of ^food required was estimated each week, 

 from Wolff's "feeding standards," <vith a slight modification as to 

 quantity. For one hundred pounds live weight there was feed 

 daily an amount of food which would contain, for 

 T j -536 ^t)S. albuminoids. 



1 3-36 lbs. non-albuminoids. 

 T 4- j -53 It's, albuminoids. 



^' 1 3-33 lbs. non-albuminoids. 

 ,,, .Q., ^ , , . ( .40 of albuminoids. 

 Wolff s standard is j ^^^ ^^ non-albuminoids. 



The ratio of albuminoids to non-albuminoids (nutritive ra- 

 tio) is practically the same as Wolff's, but the total digestible mat- 

 ter daily for one hundred pounds live weight is 3.86 pounds as 

 against 2.80. This excess is apparently greater than is actually 

 the case, owing to the way in which the live weight was estimated 

 in advance. 



The pigs were weighed individually each week, and the ra- 

 tion for the succeding week was figured, not on the actual weight 

 at the commencement of the week, out upon an estimate of 

 what each lot would weigh at the end of the week ; this was 

 done by adding to the actual weight an amount equal to the av- 

 erage gain of both lots for the preceding week ; as a matter of 

 fact, therefore, the quantity of food was always figured for a 



4 



