58 
no unusual degeneration. There has been no one in- 
fection atrium by which our attention was arrested. 
The lungs have shown very few inflammatory changes. 
This epidemic of endocarditis can only be explained 
by conceiving that the animals passed the bacteria almost 
directly from one to the other since the streptococcus live 
but a very short time in nature. Biologically there is 
nothing specific for endocarditis in the bacteria isolated. 
One experiment to produce this disease in a rabbit by 
injecting a culture isolated from an opossum had a nega- 
tive result. 
Respectfully submitted, 
HERBERT FOX, M.D., 
Pathologist. 
