TUBERCULOSIS IN CATTLE. rt 
THE PRESENT ATTITUDE OF EUROPEAN SCIENCE 
TOWARD TUBERCULOSIS IN CATTLE. 
BY H. W. CONN. 
When the subject of tuberculosis was before the Connecti- 
cut Legislature two years ago, it was urged by representatives 
of the Storrs Experiment Station that more information as to 
the actual condition of facts was needed. The Legislature did 
not see fit to make any appropriation toward obtaining such in- 
formation. The Station was thoroughly convinced of its 
necessity, however, and during the last year, partly through aid 
from the Experiment Station and partly through the generosity 
of Wesleyan University, I have been enabled to visit many of 
the chief centers in Europe, where the matter of bovine tuber- 
culosis has been a subject of special investigation. The op- 
portunity has been used as far as possible to obtain information 
as to the attitude of European scientists toward problems which 
concern tuberculosis among cattle, as well as to inquire into 
the lines of experimenting which are now going on. The 
present paper is designed to put into the hands of Connecticut 
farmers the most recent information to be had upon this im- 
portant subject. While the statements given apply primarily 
to the problem as it exists in Europe, they interest our own 
communities as well. 
In such a discussion it is not always easy to distinguish fact 
from theory. It is, however, the failure to distinguish demon- 
strated fact from mere inferences that has given rise to much 
of the confusion and disagreement among those who have dis- 
cussed this subject. It will be my endeavor, therefore, in this 
paper to make no statements as definite unless they are so well 
attested by facts that they may be regarded as parts of scientific 
demonstrations. Where opinions differ in regard to impor- 
tant points, the differences of opinion will be noted. Of 
course it is sometimes a matter of personal opinion as to 
whether any particular conclusion is demonstrated or still 
hypothetical, but it will be my aim, so far as possible, to make 
as definite statements only such conclusions as are acknowl- 
edged among scientific men as being proved. 
