. PNEUMONIA. 
245 
The pneumonia virus is no unity, inasmuch as pulmon- 
r inflammation can be produced by different kinds of bac- 
ia. 
From experiments of Friedlander and Frankel it is obvious 
it pneumonia is associated with more than one pathogen- 
c germ. The separation of pneumonias into croupous, 
>ar, and lobular, has an anatomical but no etiological sig- 
icance. 
During the course of pneumonia micrococci may befound 
tt only in the lungs, but also in the blood, kidneys, liver, 
dn, and in fact nearly all the tissues of the body. 
There can be but one etiological explanation of the dis¬ 
use : Pneumonia is the harvest of the seed sown. It is not 
probable that the various predisposing causes, such as 
A, exhaustion, and debility lower the vitality and render 
!; animal susceptible, thus changing the character of the 
sue soil, so that the virus can grow and produce its specific 
sets. 
This brings us to the time-honored prejudice in favor of 
id. Horses shiver when they are cold, and often shiver 
rder with pneumonia, hence the conclusion that cold is the 
use of pneumonia; but cold can no more generate pneu- 
>nia than it can glanders or farcy, if it is due to microbic 
ection. A horse with pneumonia may really be more ill 
tb a low temperature than when he has the maximum 
rexia usually manifested in this disease. The question of 
3 two great classes of antipyretics, those which act directly 
the thermogenic centres, those which merely reduce the 
rface temperature and prevent the accumulation of heat 
thin the organism suggest themselves. Now, I contend 
it by the exhibition of drugs of the antipyretic class in 
ses large enough to keep down the temperature any great 
lgth of time, we diminish the power of the thermogenetic 
ntres, which is really the stimulus given by the enemy. 
By the external mode of thermolysis, sponging along the 
ine, over the head, in the flanks, the extremities, etc., the 
st results are obtained. This mode of antipyresis is, in my 
inion, under favorable circumstances—that is, when the 
