U. S. VETERINARY MEDICAL ASSOCIATION. 
433 
a parasite that can be detected by microscopic examination as lias 
been explained by Dr. Smith. It may be outside the blood cor¬ 
puscles, it may be contained in the liver, in the bile of calves born 
from those cattle, which calves must naturally be vaccinated from 
their mothers, when they are born on Southern soil, yet they have 
been able to resist the germ on the Southern soil. It must be this 
immunity is conferred by principle, and it is on that principle we 
have been working. We have been trying to find out by what 
principle immunity is conferred and if we could find that out it 
would solve the whole question of Texas fever; and therefore, 
gentlemen, we have tried to be honest in this matter. Our 
methods have not been perfect, perhaps ; but we have not lost any 
specimens by putrefaction. 
Dr. Salmon : I think in justice to the investigations that have 
been made in the Bureau of Animal Industry, if not from the 
point of justice, at least from the point of making an explanation 
in regard to our work, that it would be proper for me to say a few 
words at this time, although I shall cover the subject of Texas 
fever in a paper I expect to read to-day. 
I regard it as unfortunate that there should be so much feeling 
between different investigators in the same field of work. There 
is room enough for all of us to work and surely enough to be done, 
and the important question connected with these diseases will be 
solved none too soon if we all work and strive together to throw 
what light we can upon the subject. As far as I am concerned, I 
feel no jealousy in regard to the work of Dr. Paquin or any other 
investigator, and I should feel great regret if I knew there was 
any such jealousy in regard to my work, because I appreciate the 
importance of all working together. We will naturally get some 
different results, but when we come to put those results together 
and study them and draw our conclusions we will probably see 
that each from its standpoint, from his method of work, is able to 
throw light upon the problem which we all desire so much to un¬ 
derstand. 
The subject of Texas fever is undoubtedly one of the most dif¬ 
ficult problems that investigators in this or any other country have 
ever attempted to solve. It is a disease peculiar in its character- 
