ISOLATION OF TUBERCULOUS CATTLE BY SEPARATION. 403 
was so large, the entire separation of so large a number from 
breeding purposes, would have caused serious trouble in the 
working of the farm, and great loss to the management; there¬ 
fore, Hon. Von Sivers decided that those cows which were 
found diseased by the tuberculine test should be placed 
on two of the smaller farms, but their calves brought to the 
principal farm, and here fed, with the offspring of the healthy 
animals, on the unboiled milk of the cows which were found 
healthy by the tuberculine test. After the weaning of the 
calves from the use of milk, to make room for the other 
young calves, they were taken from the principal farm and 
placed on the third smaller farm which had been reserved for 
the young stock. They were here placed in a new barn and 
here kept until the separation after the tuberculine test. 
The use of milk from healthy cows which had shown no 
reaction in the tuberculine test, in the raising of calves, was 
done to avoid the danger of infection by milk, and, in fact, 
did give good results, as will be shown by comparing the 
tables of three succeeding years. The calves of these three 
years were, in the majority of cases, offspring of sick cows. 
I-—The sixty-seven calves of the year 1891 did not re¬ 
ceive milk from cows pronounced healthy by the tuberculine 
test. The injection, given in November, 1891 (dose .005-01), 
resulted as follows: 
Healthy, 39 - . (58.20 per cent.) 
Sick, 26 - - (38.80 “ “ ) 
Uncertain, 2 - . ( 2.86 “ “ ) 
Total, 67 
II.—The calves of 1891 and 1892 were fed on the milk of 
healthy animals. 1 he 109 animals which were injected in 
June, 1892 (dose o. 1 tuberculine), gave the following result: 
Healthy, 89 - - (81.15 per cent.) 
Sick, 10 - - ( 9.17 “ “ ) 
Uncertain, 10 - - ( 9.17 “ “ ) 
Total, 109 
HI-—In 1892 and 1893 there were 78 calves, which had 
