AGRICULTURAL EXPERIMENT STATION. 



63 



the way of an intelligent study of the effect of foods is our igno- 

 rance of the source of the butter fats. While the prevailing theory 

 is, perhaps, that the butter fats are produced from the nitrogenous 

 constituents of the food, there are still those who believe, and 

 their opinions cannot be entirely gainsaid, that the fats of the foo I 

 in some way directly contribute to the fats in the milk. If the 

 fats of the food are conveyed directly into the butter, then we 

 would expect to see a marked effect from the presence of either 

 linseed meal or cotton seed meal in the ration, as these feeding 

 stuffs carry a much higher percentage of fats than do others. 



By the recommendation of the Station Council, this matter has 

 been made the subject of an experiment, although similar ones 

 have been conducted before. Five of the Station cows were fed 

 three different kinds of rations during as many periods, the 

 rations in the second period differing very materially from those 

 in the first and third. An attempt was made to have this middle 

 ration carry the smallest amount of vegetable fats that would be 

 found in any combination of ordinary foods, while the first and 

 third rations contained a fair proportion of cotton and linseed 

 meal. The exact quantities and kinds of foods fed during the 

 three periods are as follows : 



Period 1 — Cotton-seed meal, corn meal and wheat bran. 



Period 2 — Pea meal and barley meal. 



Period 3 — Linseed meal, corn meal and wheat bran. 

 Kinds and Quantities of Food. 





03 



w 



o 



11 



O 



o 



3j 



s 



□0 



a 

 3 



O 

 S 



a 



u 



o 

 O 



a 



03 



,0 



a: 



53 



a 



Ph 



® 



03 



1st Period. 



23.9 

 2-2.3 

 20.6 

 20.6 

 20.2 



24. 



22.7 



21.1 



20.2 

 20.2 



21.5 

 21. 5 



20.5 

 20.5 



20.5 



2 



1 ■', 

 IK 

 1 V 

 IK 





4 



ZK 

 3 



o 



2 



VA 



\K 



1% 



IK 

























Ida 







2d Period (Feb. 21 to Mar. 18). 



4 



Vi 



ZK 



3 



3 



4 



ZK 



ZK 



3 

 3 











































3d Period. 





2 



1'. 

 1 K 



1 '• 



IK 



4 



Vi 



S'i 



3 



3 



2 



IK 



IK 



l'» 



1 '• 





















Ida 







