666 
J. LAW. 
normal, and the destructive process going on in the seats of the 
tubercles will be accelerated. In cattle this is now used as a 
most valuable test of the presence or absence of occult tubercle. 
In horses and other animals the subjects of tuberculosis “tuber¬ 
culin” causes the same rise of temperature, and this action may 
be accepted as the rule in all classes of animals. In the tuber¬ 
culous man this action of “tuberculin” is a well established fact 
and was made the basis of Koch’s employment of this material 
as a curative agent. The daily hypodermic use of “tuberculin” 
in cases of lupus or other superficial forms of tuberculosis led to 
a more active congestion and an earlier molecular death of the 
local tubercle until that was separated from the living healthy 
parts and the progress of tuberculosis at that focus was arrested. 
If there were no deeper unseen tubercles in the system, a real 
cure might be effected in this way. But the cure in such a case 
was only secured by a temporary aggravation of the disease 
in its primary focus. Nor was this all. If other tubercles ex¬ 
isted in internal organs, they too had the morbid process aggra¬ 
vated and extended, and the death of tissue increased by the 
fresh introduction of “ tuberculin ” from without. In such a case 
the increased mass of tubercle—dead and living—remained con¬ 
fined in the midst of the surrounding solid tissues, and as the 
infecting materials could not be separated and cast off from the 
body, they continued their ravages with an increasing force in 
proportion to their recent artificial extension. 
It is this extension of the tuberculosis under the influences 
of the toxic products of the bacillus, which raises the most im¬ 
portant question in connection with the consumption by man of 
the flesh and dairy products of tuberculous animals; and yet this 
question has been overlooked by sanitarians in the most unac¬ 
countable way. It has seemed enough for them that the living 
tubercle bacillus did not exist in the muscle juices nor milk. It 
seems never to have occurred to them that all the soluble toxic 
products of this bacillus were constantly circulating in the blood 
passing through the muscles, and that they equally traversed 
the bloodvessels of the mammary glands and escaped into the 
