110 
F. S. B1LLING8. 
views on this subject, asserts that the term “ duality of syphilis ” 
really signifies a duality not in syphilis, but in what had been 
known as syphilis and called by that name. Otherwise, he ob¬ 
serves, we must adopt the ridiculous supposition that so-called 
“ dualists ” believe in two kinds of syphilitic virus, whereas they 
have simply maintained that there exists, independent of the 
syphilitic virus, another contagious principle giving rise to a local 
sore known as the chancroid. If Mr. Hutchinson intends to limit 
the power of producing the soft chancre to contagion with in¬ 
flammatory products arising from syphilis, Dr. Bumstead con¬ 
siders him in error, since sores precisely similar to the chancroid 
have been produced by other inflammatory products. Mr. 
Hutchinson’s view, however, that the chancroid, instead of being 
dependent upon a specific virus, incapable of spontaneous genera¬ 
tion, is the result of inflammatory products, and hence that, if 
every chancroid now existing were exterminated, new chancroids 
would arise—this, Dr. B. thinks, has strong arguments in its 
favor, and may be looked upon as a step in advance, suggesting 
An interesting analogy with the history of gonorrhoea during the 
last fifty years. Finally, Dr. Bumstead declares his belief that 
the “ dualism ” still lives, and that Mr. Hutchinson is, in fact, 
one of its most advanced apostles.—[Qelmuth’s System of Sur* 
gery, 3d ed., p. 168.] 
(To be continued .) 
TRICHIN/E, 
A LECTURE DELIVERED BEFORE THE STUDENTS OF THE 
k AMERICAN VETERINARY COLLEGE, 
Bv F, S. Bilungs, V. M. 
(Continued from page 58 ,) 
PREVENTION. 
The above remarks have emphatically indicated that some 
restrictive and corrective measures of protection are absolutely 
necessary. And the same should be energetically impressed both 
upon the people and upon hog raisers by the respective State 
governments through the Boards of Healthy both State and local 
