
TUBERCULOUS COWS AND USE OF THEIR MILK. 163 
The history of these two calves and the peculiarity of the 
feeding tests are such as require more than passing notice. 
Calf F was the offspring of a cow which, within three months 
after birth of this calf, developed a severe case of tuberculosis. 
To the best of our knowledge also the dam of calf E was a 
pronounced case of tuberculosis. Dr. Mayo, in a report of 
the physical condition of the cows, February 7, 1899, says: 
“‘Cow No. 1341 . .  . would probably be condemned as 
tuberculous on physical examination.’’ Calf F was fed the 
normal milk of a tuberculous cow (No. 1341) for about ten 
months; was then at pasture for about five months, and was in 
the stable with the tuberculous cows for about four months 
more before it responded to the tuberculin test. Calf E was 
fed pasteurized milk from cow No. 1341 for nearly ten months, 
then normal milk from the same cow for about three weeks, 
then was at pasture nearly five months, and responded to the 
tuberculin test within three weeks of the time she was returned 
to the stable. The result of these tests seem to show that 
there were marked differences in the two calves in their power 
to resist the germs of tuberculosis. It would seem either that 
calf EK must have contracted the disease within the three weeks 
in June, 1899, while it was being fed the normal milk of its 
dam, or else that the quarantine between the calves and the 
cows in the same barn was not effectual. On the other hand 
calf F, the offspring of another badly diseased cow, resisted 
the germs from the normal milk of cow No. 1341 for a period 
of over ten months, and also failed to contract the disease from 
association with the cows until a period of about a year had 
elapsed (omitting the time at pasture). The post-mortem exam- 
-. ination of calf E was made by the College Veterinarian, Feb- 
ruary 12, 1900. ‘The only trace of the disease discovered was 
in the liver, in which one tubercle, which was somewhat cheesy 
and about the size of a large walnut, was found in one of the 
smaller lobes. Calf F was sold in the Brighton market, under 
Government inspection, in April, 1900, and was passed as a 
slightly diseased animal. 
Feeding Calf G with the milk of Cow 1343.—This was a small 
heifer calf, dropped by cow No. 1343, August 28, 18098. if 
was small at birth and appeared rather puny until a year or 
more old. It-was-fed the milk of its dam from the time of 
