STATE CONTROL OF TUBERCULOSIS. 
463 
to pay no attention to anything except tuberculin and tubercu¬ 
losis. I have often felt that this whole matter should be taken 
up in a broader, more general way ; that the important question 
of wholesome milk should receive greater attention than it has. 
The work being done by the various sanitary boards should be 
broadened, and widened. They should pay greater attention to 
the value of cleanliness and light, ventilation and drainage. 
Tuberculosis is not the only evil to be avoided, and in attending 
to the surroundings all are helped and both consumer and pro¬ 
ducer are benefited. 
Again, it has seemed to me sometimes as if there had been 
too much anxiety among certain veterinarians to increase and 
exaggerate such danger as their might be, not so much for the 
good of the public as because the more the people became panic 
stricken the greater the likelihood that their pocket-books 
would be fattened. 
On the other hand, it is only since the introduction of tuber¬ 
culin that we have had any reason to hope that we may finally 
be able to control the spread of tuberculosis among dairy cattle. 
Tuberculin has not only enabled us to rid many individual 
herds at least temporarily of tuberculosis, but it has greatly 
modified and changed the generally accepted opinion of tuber¬ 
culosis. 
It has enabled us to gain a truer insight into the mysteries of 
heredity, and it has shown more clearly the prevalence of tuber¬ 
culosis. 
Probably one of the most important of the new facts brought 
to our notice through the use of tubecuHn is a knowledge of 
the immense number of latent or undeveloped cases of tubercu¬ 
losis that exist in every herd. It is startling to see a large num- 
of autopsies made, and note what a large proportion show 
only very slight evidence of disease. In referring to this 
matter Bang says : “ As soon as tuberculin inoculation was un¬ 
dertaken on a large scale the public was surprised at the very 
large number of reacting animals, even in herds of healthy ap¬ 
pearance. I refer to the work as done first by Koepp in Dorpat, 
