i 3 2 
PROF. JAMES LAW. 
the two Holstein cows, it had not prevented a perceptible im¬ 
provement in this respect. 
. POST MORTEM EXAMINATIONS. 
To complete the record the two farrow cows were killed 
December 5th, 1894, and subjected to careful necropsy. In the 
main the viscera were sound. The shorthorn grade had pus in 
-each of the left quarters of the mammary gland in the milk 
sinus, the walls of which were red and thickened. 
When strained and placed under a microscope the pus showed 
numerous cocci but no bacilli. 
As is usual in old cows, the groups of lympathic glands in 
the intermaxillary and pharangeal regions, on the chest, the 
abdomen, the subcutaneous and intermuscular regions were pig¬ 
mented of a dark grayish color, varying at different points but in 
no case showing molecular degeneration, coagulation necrosis 
(caseation) nor even perceptible congestion. In the shorthorn 
grade the lympathic glands behind the diseased mammae was 
considerably enlarged. 
EXPERIMENTS AT THE UNITED STATES BUREAU OF 
ANIMAL INDUSTRY. 
In the investigations concerning bovine tuberculosis, 1894, 
Dr. Schweinitz records the effect on the milk of the two healthy 
cows, one of which received one dose, and the other three suc¬ 
cessive doses of tuberculin. The dose in each occasion was 2 
c. c., for each cow, and as they were common stock it may be 
inferred that it was a full dose considering the probable weight 
of the animals. Of variations in temperature it is enough to 
say that there was no more than would occur in the best of 
health. The analysis of the milk is given in table X from 
which it will be seen that in the single test of cow No. 113, there 
was a slight reduction of the total solids, and of the different 
constituents such as sugar, albuminoids and fat. The second 
cow No. 217 tested three times under tuberculin, and once on 
five successive days without tuberculin gives a more trustworthy 
