14 HATCH EXPERIMENT STATION. [Jan. 



Paht II. 



FEEDING EXPERIMENTS ANT) DAIRY STUDIES. 



A. — EFFECT OF FEED ON THE COMPOSITION OF MILK, 

 BUTTER FAT, AND ON THE CONSISTENCY OR BODY 

 OF BUTTER. 



J. B. LINDSEY.* 



Conclusions. 

 As a result of the experiments which follow, concerning 

 the influence of feeds and feed constituents on the composi- 

 tion of milk, butter fat, and on the character of the butter, 

 the following deductions are made : — 



1. Difi*erent amounts of protein do not seem to have any 

 influence on the composition of the milk. 



2. Linseed oil in flax-seed meal, when fed in considerable 

 quantities (1.40 pounds digestible oil daily), increased the 

 fat percentage and decreased the nitrogenous matter of the 

 milk. This fat increase was only temporary, the milk grad- 

 ually returning (in four or five weeks) to its normal fat con- 

 tent. The nitrogenous matter also gradually returned to 

 normal, but more slowly than the fat. 



3. In general, feeds containing much oil have a tendency 

 to slightly increase the fat content of milk when first fed. 

 The fat percentage gradually returns to normal. 



4. It is not practicable to feed large amounts of oil to 

 cows, as it has a tendency to derange the digestive and 

 milk-secreting organs. 



* Ably assisted by E. B. Holland, F. W. Mossman, B. K. Jones and P. H. 

 Smith, Jr. 



