212 REPORT OF THE CHEMIST OF THE 
the several trials with five animals. The cows experimented with 
being three Jerseys and two natives or no breed animals. 
When hay alone was fed the yield of milk, and butter as well, 
was always the lowest. The addition of eight pounds of corn 
meal per day increased both.the flow of milk and the yield ,of 
butter over that of hay alone, but the butter fat in the milk, as 
shown by analysis, did not increase in proportion to the yield 
of milk. The substitution of five pounds per day of linseed meal 
for six pounds of the corn meal, making the grain ration two 
pounds of corn meal and five pounds of linseed meal, gave a — 
smaller yield of milk than when corn meal alone was fed. The 
yield of butter fat nevertheless was increased in every trial with 
linseed meal, and in the case of two cows with the same relative 
increase would amount to more than seventy pounds of butter per 
year for each cow. 
Replacing the five pounds of linseed meal with eight pounds of 
wheat bran the milk yield was rather less on the whole, but in 
one case more than when linseed meal was fed. The yield of 
butter was considerably diminished. To illustrate more fully I 
repeat the following from my notes. In the first sae there was 
fed hay ad libitum, corn meal and wheat bran: 
Milk per day, twenty pounds seven ounces; milk fone one pound 
butter, 21.3 pounds; butter per day, 15.4 ounces; per cent water 
in butter, 12.79. 
In the second period linseed meal replaced the corn meal, other- 
wise the feed was the same as in period one : 
Milk per day, twenty pounds one ounce; milk for one pound of 
butter, 16.2 pounds ; butter per day, 18.5 ounces; per cent water 
in butter, 12.65. 
A slight falling off in milk and an increase in butter, and 5.1 
pounds less milk required to produce a pound of butter. The 
gain secured in this case would amount to 70.6 pounds of butter 
per year. The substitution of oats for the linseed meal was fol- 
lowed by smaller milk yield and less butter, but of superior 
quality to that from linseed-meal feed. 
The experiments with ensilage and cotton-seed meal have not 
been repeated a sufficient number of times to warrant any definite 
conclusions. With ensilage, the chief difference noted was the 
more efficient recovery of the fat in the butter, and the butter 
under cotton-seed meal was of much better quality than when lin- 
