644 
PROFS. STALKER AND NILES. 
tion’s kindness, we produce that of a hypertrophied liver with 
tuberculous areas here and there, and also that of a part of 
the mesentery of an animal showing the presence of the tuber¬ 
cles scattered over the surface. 
In relation to the value of the tuberculin test, which has 
already been so extensively demonstrated, we find in the bul¬ 
letin these remarks, which are of great value : 
It has not been alone the purpose of the Station to prove 
or disprove the reliability of the tuberculin test, but to com¬ 
pare its value as a diagnostic agent, with other means of rec¬ 
ognizing the disease. To this end a large number of tests 
and post mortem examinations have in manv cases revealed ex¬ 
tensive tuberculous lesions. These have been found in all 
parts of the body, including extensive diseased conditions of 
the mammary glands. 
EXPERIMENTS IN FEEDING THE MILK OF TUBERCULOUS COWS. 
The use of milk on experiment animals for the purpose of 
artificially inducing the disease in otherwise healthy individ- 
uals is a practical way of putting to the test some of the theo¬ 
ries as to sources of danger. If the milk from tuberculous 
cows, either taken in the ordinary way, or injected directly 1 
into the circulation can induce tuberculosis, the fact becomes t 
one of no ordinary moment. The significance of the experi -1 
ment has a two-fold importance. j 
First .—It enables us to account for many cases of the! 
disease in young cattle. It has been shown by repeated ob- 1 
servations that congenital infection is rare. However, calves 
but a few months old are frequently found to be infected. : 
Second. If milk from tuberculous cows possess infectious 
properties, the health and safety of the human family becomes 
the important part of the question. If feeding the milk to 
lower animals under ordinary conditions will induce the 
disease, there is no avoiding the conclusion that it can be in¬ 
duced in the human family under the same conditions. This 
experiment has been repeated with sufficient frequency, and 
under conditions to prove the certainty of results beyond 
continuing. As to the presence of the disease in the State, to 
its origin in Iowa and its extent, we extract: 
