ZL STORRS AGRICULTURAL EXPERIMENT STATION. 
it is that the figures which have been shown above, if they in- 
dicate anything, indicate that the increase in the disease is not 
a slow one, and, while we recognize the uncertainty of the 
statistics, we must admit that this disease is beyond much ques- 
tion increasing in European herds with considerable rapidity. 
In the United States there are practically no data from 
which any inferences can be drawn. ‘The use of tuberculin is 
too new and has not been extended sufficiently to give any con- 
clusions from this source, and official inspection of slaughtered 
animals has not been carried to an extent in this country to 
make it possible to draw any conclusions as to the increase of 
the disease here. There is probably little doubt that its course 
is the same as in foreign countries, and there is a general be- 
lief that it is increasing, but the question cannot be answered 
positively. 
D. MEANS OF DISTRIBUTION OF TUBERCULOSIS. 
Of all the topics connected with the subject of tuberculosis 
among animals and man, there is none of more importance 
from every standpoint than that of the method by which it is 
distributed from individual to individual. If we could learn 
this accurately we should be far along toward the solution of 
the problem of the weeding out of the disease, both among 
cattle and in the human race. It is a subject over which there 
has been a very large amount of study and thought and, as we 
shall see, a subject over which at the present time there is a 
very wide difference of opinion. Certain methods of distribu- 
tion are well known and generally accepted, but upon nearly 
every point in connection with the subject there is some differ- 
ence of opinion. In our consideration of this subject we will 
divide it into three heads, as follows: (a) Transmission from 
animal to animal. (b) Transmission from man to animal. 
(c) Transmission from animal to man. 
(a) TRANSMISSION OF TUBERCULOSIS FROM ANIMAL TO ANIMAL. 
The first point to demand attention in this connection is 
the question as to whether the disease is congenital, that is, 
whether it is carried from the parent to the offspring. While 
there has been in the past a great deal of dispute upon this 
matter, and while opinion has been greatly changed in the last 
fifteen years, it may be stated that finally there has been 
reached an absolute consensus of opinion. There is no longer 
