TUBERCULO-INFECTION OE MAN. 
559 
The tendency of pathological processes induced by syphilis is 
sclerosing in character, while that of tuberculosis is resolving, re¬ 
sulting in the production of fibrous tissue on the one hand, in the 
case of syphilis and in the resolution, the breaking down of the 
tissues on the other hand, in the case of tuberculosis, in general, 
though we do know of a fibroid phthisis, and in bovine tuber¬ 
culosis of this type the tendency to the formation of fibrous tis¬ 
sue, histologically predominates apparently, the lesions them¬ 
selves, macroscopically, taking the form of nodes and con¬ 
glomerates, which on serous membranes may be pedunculated, so- 
called pearl disease. So much for anatomical considerations, nor¬ 
mal and abnormal 
This distinction that I make between normal and abnormal, 
meaning with abnormal not pathological, but sound, healthy; ab¬ 
normal merely in differing from a typical established prevailing, 
usual arrangement—would serve to explain, why in a group of 
individuals otherwise exposed to absolutely the same living con¬ 
ditions, food and environment, some escape the disease while the 
others, sometimes but a single one, fall a victim to it. 
The inheritance of family peculiarities, no doubt equally often 
expressed in the arrangements of the finer anatomical vascular 
peculiarities the same as, familiarly, with facial resemblances, 
would explain the family tendency to the disease so often ob¬ 
served without evidences of the disease itself until it suddenly 
becomes manifest. 
CONCLUSIONS. 
Had it been my intention to merely assert the importance of 
the intestinal tract as the chief primary source of even pulmonary 
tuberculosis, I could have made such assertion and easily cited 
the strongest evidence in support of it. 
While I shall still adduce such testimony, this was not my 
original purpose. I rather desired to study the explanation of 
the mechanism by which pulmonary infection through such 
sources could be, and, in fact, is brought about, and that is what 
I have endeavored to do. 
It may still be well to show you that there is a brilliant galaxy 
