190 Annual Report of the Royal Veterinary College cm 
Tuberculosis. — It has been proved : — (1) That milk from tuber- 
culous animals, when the udder is implicated in the disease and the 
milk contains tubercle bacilli, produces tuberculosis in rabbits. 
When the milk was given to the rabbits with their food the disease 
was confined to the digestive organs. The introduction of the milk 
under the skin produced general tuberculosis. The flesh of the cow 
from which the infected milk was obtained was given to rabbits 
without results. It lias also been ascertained that by feeding on 
discharges from the human subject affected with consumption 
tuberculosis is induced in rabbits. 
(2) That rabbits fed on tuberculous matter from the ox contract 
tuberculosis identical with that induced by feeding on tuberculous 
matter from the human subject. 
(3) That oxen fed on milk, previously boiled, to which tuber- 
culous matter from consumptive human beings has been added, 
contract tuberculosis which is apparently identical with that known 
as bovine tuberculosis. 
Blackleg. — Experiments were carried on for some time for the 
purpose of testing the protective value of the modified virus of 
blackleg ; but the results up to the present time have not been such 
as to warrant the adoption of so-called protective inoculation in this 
disease. . Inoculation with the dried juice of diseased muscle, 
attenuated by the method of M. Arloing, failed to protect the 
animals in many cases, and in several instances calves which had 
not been protected resisted inoculation with the dried spleen juice 
mixed with water, and a few calves resisted the injection of the 
muscle juice diluted with water. These results are important 
chiefly on account of the evidence they afford of varying degrees of 
susceptibility to the infection of blackleg. 
At present the inquiry is being continued in the direction of the 
bacteriology of blackleg. A considerable number of organisms have 
been isolated from the fluid expressed from the diseased parts, and 
it is proposed to ascertain whether any of these organisms will 
produce the disease, with the ultimate object of using the same 
organism, after cultivation, for the purpose of protective inoculation. 
Swine Fever. — Numerous experiments have been made for the 
purpose of ascertaining if any of the organisms which are found in the 
diseased parts in swine fever will produce the disease when given to 
healthy pigs ; but no positive results have yet been obtained. Four- 
teen distinct organisms have been isolated, but none of them pro- 
duced any illness at all when given in considerable quantities to 
healthy swine, nor were any of the animals thus fed protected from 
the natural disease — in fact, they all died of typical swine fever 
when they were introduced into an infected sty. For example, it 
was found that the juice expressed from the lung, spleen, and 
intestine induced swine fever in healthy pigs which were fed with a 
small quantity of the fluid mixed with their ordinary food. The 
same results followed the feeding with spleen juice diluted with 
twenty times its bulk of water. But when the organisms cultivated 
from the diseased parts were employed for the feeding no disease 
