PROCEEDINGS OF SECTION I. ote 
trum, middle ear, meninges, and mucous membranes; whilst 
the pneumococci give rise to innumerable cases of pneumonia. 
Again, there seems some special antagonism between influenza 
and typhoid fever, rather, however, of favouring conditions 
than of actual germs ; for in several cases I have known patients 
to develop an attack of influenza during the incubation period of 
typhoid fever. Further, the seasonal antagonism coincides, as 
Dr. Carstairs has shown, with the ozonic variations that appear 
to control the rise of influenza and the fall of typhoid. 
9. In the case of a disease so unique in its appearances, 
phases, and potency, the most important question must, after 
all, be its prevention. Spreading, as it does, through the 
medium of the atmosphere, even more perhaps than by contact 
with infected cases, it must ever be outside the ordinary mea- 
sures of isolation and disinfection. Hence external attack will 
probably continue until we have mastered the secret of the con- 
dition which permits of such widespread invasion. And sub- 
sequent satisfactory resistance by the individual seems bound 
up in a thorough knowledge of the bacteriology and hygiene 
of the naso-pharynx, the first line in our systemic defence. 
