CONGRESS J ON TUBERCULOSIS. 
475 
rapidly done by the present process ; the milk should be boiled 
before being sold and consumed, even by the animals on the 
farm. The dairyman should be obliged to give information to 
the inspector as soon as he has ascertained the appealance of a 
mastitis of any sort. When the diagnosis is confirmed, the dis¬ 
eased cow should be rigorously excluded from giving milk, and 
should be slaughtered without the least delay. Lastly, the sub¬ 
products of butter or cheese manufactories (skimmed milk, but¬ 
ter-milk whey, etc.) should not be delivered for the consumption 
of persons or animals until they have been pasteurized at the 
minimum temperature of 85 Centigrade. 
III. Presentation of a goat attacked with experimental mas¬ 
titis, and demonstration of the process of diagnosis called “ har- 
ponnage.” 
IV. Presentation of tables demonstrating the efficacy of the 
procedure recommended by the author for rendering cow-houses 
that are most seriously infected with tuberculosis healthy, and 
to restore them to their original state without being obliged to 
buy a single animal from outside. Calves born of tuberculous 
cows remain healthy on the only condition of isolating them 
from their mothers as soon as they are born, and of feeding them • 
by bottle with boiled milk. 
[ABSTRACT.—Section TV.'] 
THE DIAGNOSIS OF TUBERCULOSIS IN LIVING 
ANIMALS BY SERUM-AGGLUTINATION. 
By Professor Arloing, Lyons. 
Since 1898, the author has been trying to discover the ex¬ 
istence of tuberculosis in man and in animals by agglutination 
effected by the serum of suspected subjects (des suspects) and a 
homogeneous culture of Koch’s bacillus in a glycerinated broth, 
carefully selected for this purpose. 
Applied to animals of the bovine species the observations, 
carried out on more than 150 subjects, have demonstrated :— 
1. That the blood serum of calves from five to eight weeks 
old does not agglutinate these cultures and does not clear them 
when in the strength of 50 per cent. (i. e ., 50 per cent, serum.) 
2. That the serum of healthy adults agglutinates and very 
often clears when of 20 per cent, strength, but never completely 
when of 10 per cent, strength. 
3. That the serum of tuberculous adults, with rather rare 
exceptions, agglutinates and clears completely when between 
