184 STORRS AGRICULTURAL EXPERIMENT STATION. 
either during the three weeks while the unpasteurized milk 
was being fed, just before the calf went to pasture, or else 
during the three weeks after being returned from pasture, 
just prior to responding to the tuberculin test. The fact that 
the other calf, also an offspring of a tuberculous cow, did not 
show any signs of the disease six months after a feeding period 
of ten months with the unpasteurized milk, but did respond 
after being associated with the cows for several months more, 
would seem to show that the milk had not proved infectious. 
Two other calves were fed the milk of their dams from 
August and September, 1898, until the next June. Thus one 
was fed a period of over nine months and the other a period of 
ten months while associated with the cows. At the end of 
ten months’ feeding in one case and nine and one-half in the 
other neither of the calves responded to the test. One calf 
was at pasture from June 24 to November 13, while the other 
remained in the stable with the cows. Both responded to the 
test on December 2, following, three weeks after one of the 
calves was returned from the pasture. These tests would seem 
to show that either the milk is very slow in transplanting the 
germs of the disease, or that the development of the disease 
is slow when the germs are transmitted by the milk, or else 
that the disease was transmitted by other means due to the 
association of the calves with the cows. 
Two more calves were fed the milk of the two other cows. 
One calf (1) was from a tuberculous cow in another herd and 
the other one (K_) was from cow No. 1343. Calf I was kept 
in the same stable with the cows, and after being fed the milk 
of cow No. 1344 for a period of ten weeks responded to the 
tuberculin test. Calf K was fed the milk of its dam (No. 
1343) while isolated in a room in another part of the barn. 
After a feeding period of nearly three months this calf re- 
sponded to the tuberculin test. 
In this series of tests five calves were fed the milk of the 
tuberculous cows, in periods varying from ten weeks to ten 
months. ‘T'wo of these tests were made from one to one and one- 
half years later than the other two, and the disease had in the 
meantime made marked progress in at least three of the cows. 
