15 



THE COMPARISON OF COTTON-SEED 



with cotton-seed meal was made upon the groups III and IV, and 

 three of the cows in the groups were tested individually. With 

 group III, the cotton-seed ration (d) preceded the cotton-seed 

 meal (e). 



The iodine number was steadily lowered ; but, while cotton seed 

 lowered the volatile acids from 29.0 to 19.3, the meal raised them 

 from 19.3 to 25.4; the same phenomenon was also noticed with 

 Chinchilla alone. 



With group IV the order was reversed, and there was a steady 

 decrease in both iodine number and volatile acids. The former 

 decrease, as already explained, was contrary to the advance of 

 lactation, while the decrease of volatile acids was so sharp that it 

 must have been partly caused by the food. Comparing the rate 

 of change in both constituents, for each substance, cotton seed in- 

 fluenced the composition of the butter, more than the cotton-seed 

 meal. 



CORN MEAL WAS FED 



to Chinchilla, in ration (b) after cotton-seed meal ration (e). The 

 figures have already been mentioned, but attention is again called 

 to the lowering of the iodine number and the non-interference with 

 the natural decrease of the volatile acids. 



GLUTEN MEAL, RATION (c) 



was fed to Duchess and Duchess, 2d, after cotton-seed (d), and to 

 Chinchilla after (b). Part of these figures have been used before, 

 and it will be recalled that the gluten meal increased the iodine 

 number abnormally and also raised the volatile acids, when it fol- 

 lowed a food which had caused them to decrease. 



COTTON-SEED OIL 



was fed in ration (f) combined with gluten meal, and followed 

 gluten meal, ration (c), with Duchess. 



There was a decided lowering of the volatile acids, judging by 

 the preceding and following periods, which was apparently due to 

 the oil ; but the iodine number was not changed much. Applying 



