546 
A. O. ZWICK. 
undoubtedly the transmission of the germ itself, recently escaped 
or expelled from a tuberculous organism, human or bovine. 
Now as to these early cases of tuberculosis, acquired in child¬ 
hood, latent though they be, there are two points of extreme 
importance to be considered. The first is the fact that such cases, 
up to a certain point, heal apparently easily; at least they readily 
become dormant, do not progress, are latent. But, and this is the 
second point, these individuals are extremely liable to a subse¬ 
quent reinfection. There exists, as it were, a state of anaphylaxis 
—that is to say, literally, from and, off, and phylax, guard, a 
condition of being off-guard, then—occurring through a gradually 
becoming accustomed, acclimated, as it were, to the invasion, 
the encroach of a surreptitiously approaching, stealthy enemy 
lying in ambush, already on one’s own ground, ready to spring 
out and make an overwhelming attack upon the unsuspecting, 
unprepared, surprised organism. This state of affairs reveals 
itself either by excessive reaction to tuberculin, or by the prompt 
severity of the symptoms displayed on exposure to renewed in¬ 
fection, even though the latter occur in adult life, while the early 
attack took place in childhood or infancy. 
Hence here again the importance of combating, nay more, of 
heading off these early attacks, which in the great majority of 
cases are of gastro-intestinal origin through the ingestion of cow’s 
milk. 
Now you have the argument put up to you net: Most eminent 
authorities on both sides of the question advancing views dia¬ 
metrically opposed to each other! 
Whose views are we to accept? Neither! 
It is not a question of accepting views, nor of authority, nor 
of dogmatic assertion; it is a problem to be decided on its merits; 
it is matter for investigation and research, of close study of 
anatomical relations, of the direction of the lymph-stream, of the 
blood-current, to determine the routes of infection within the 
body. As a result of their investigations along these lines, 
Schroeder and Cotton, in a recent bulletin (1908-1909) of the 
Bureau of Animal Industry, conclude : “ That the assertion that 
