720 
JOHN J. REPP. 
same name, tuberculosis, in both species and which presents 
very much the same pathological picture in both ; also that we 
find in sections from the tissues of tuberculous subjects of both 
these species myriads of germs which have practically the same 
morphology and the same staining reactions; also that these 
germs from these two sources are found to have in a general 
way the same cultural qualities. These familiar characteristics, 
although they do not answer to the critical demands of precise 
science, should certainly lead us to ask for the most convincing 
proof that tuberculosis of man and tuberculosis of animals 
are two different diseases before we adopt the belief that 
they are. 
It may be stated en passant that students of this subject of 
transmissibility of tuberculosis by meat and milk, whether they 
be individuals or commissions appointed to study the matter, 
are almost unanimous in their opinion that there is danger of 
such transmission, and that this danger is great enough to call 
forth protective legislation and regulation against these sources 
of danger. Attention may be called to the fact that the British 
Congress on Tuberculosis before which Koch read the paper 
to which reference is made above passed a resolution after his 
paper was read and debated, recommending that the present 
restrictive regulations thrown around the sale and use of pro¬ 
ducts of tuberculous cattle should be continued without any 
relaxation. 
What evidence has brought them to such conclusion? 
Practically that which has been presented in this paper. 
SUMMARY. 
The evidence presented here is : 
1. That tuberculosis may be transmitted to animals through 
their eating the meat of certain other animals which are tuber¬ 
culous or by their being inoculated with it. 
2 . That tuberculosis may be transmitted to animals through 
their ingestion of the milk of certain cows which are tuberculous, 
or by their being inoculated with it, both when the udder of the 
cow is diseased and when it is healthy. 
