152 STORRS AGRICULTURAL EXPERIMENT STATION. 
By this disturbance the yields of milk were considerably re- 
duced, although the percentages of fat in the milk were some- 
what higher, so that the yields of butter fat were not much 
affected. However, when the yields for the period preceding 
this disturbance in the first test are compared with those for a 
similar period in the second test there was still a slight increase 
in the latter. 
flerd R. Tests Nos. 55 and 57.—This herd was kept mainly 
for milk production, although it had produced cream for a 
local creamery and most of the cows were of the butter type. 
Highteen cows were used in these tests, the same cows in both 
tests. ‘Twelve of the cows were grade Jerseys, two were grade 
Ayrshires, two were grade Holsteins, one was a grade Guern- 
sey and onea grade Durham. The estimated average weight of 
the cows was 750 pounds. Most of the cows had calved between 
one and six months previous to the beginning of the first test, 
although two had been milking ten and eleven months at the 
time of the first test. None of them were due to calve until 
about four months after the close of the second test. The herd * 
was well stabled and each cow had a constant supply of water 
available in her stall. The cows were not allowed to run in 
the yard, being housed all of the winter. There were no irreg- 
ularities in the general health of the cows, and all the feeds 
were well eaten. 
The coarse fodder used consisted of hay, corn stover and 
corn silage; the hay was first quality meadow hay of mixed 
grasses; the stover was of good quality; the corn silage was. 
made from corn harvested when the ears were just past the 
milk stage. The grain feeds used were wheat feed, Buffalo 
gluten feed, provender (corn and oats ground) and cotton seed 
meal. | 
The first test began January 30, 1899, and continued twelve 
days. The average daily ration for each cow was about 8 
pounds of hay, 27 pounds of corn silage and 6 pounds of 
mixed grain feeds. This ration supplied only about r. 5 
pounds of digestible protein per day, and had a wide nutri- 
tive ratio, 1:8.8. 
The second test began February 28, 1900, and continued 
twelve days. In this ration the amount of hay fed was slightly 
reduced, and corn stover was added. Cotton seed meal was 
