I 
PLEUROPNEUMONIA IN CATTLE. 
25 
As long as the encephalon or spinal marrow are not in a state 
of putrefaction, they are virulent. 
6. —To produce rabies rapidly and with certainty, one must 
have recourse to inoculation, upon the surface of the brain, in 
the arachmoid cavity, by trephining. Inoculation of the pure virus 
in the circulatory apparatus shortens also the long duration of 
the incubation stage and appearance of the symptoms. By this 
method, so advantageous to the experimental study of the dis- 
ecse, rabies declares itself after six, eight or ten days. 
7. —M. Pasteur and colleagues have met cases of spontaneous 
recovery from rabies after the appearance of the first rabid symp¬ 
toms ; never after that of the acute symptoms. They have also 
met with cases of disappearance of the first symptoms, with re¬ 
appearance of the disease after a long interval of time (two 
months). In these cases the acute symptoms were followed by 
death, as in ordinary cases. 
8. —In one of their experiments upon three dogs, inoculated 
in 1881, two had died after developing a rapid rabies ; the third 
recovered after having shown the first symptoms. Reinoculated 
in 1882 twice, by trephining, this dog remained healthy. Conse¬ 
quently, though it was mild in its symptoms, the disease did not 
recidivate. This is the first step in the discovery of the pro¬ 
phylaxy of rabies. 
9. —Pasteur possesses now four dogs which cannot take rabies 
no matter how they may be inoculated, or how strong the virus 
may be. Dogs used as witnesses, inoculated at the same time, 
have all died with the disease .—Academie de Medicine. 
PLEURO-PNEUMONIA IN CATTLE. 
REPORT OF THE TREASURY CATTLE COMMISSION ON LUNG 
PLAGUE, OR CONTAGIOUS PLEURO-PNEUMONIA, ETC. 
Sir. —[n accordance with the instructions furnished us, to 
“consult with the collectors of the ports of Portland, Boston, 
New York, Philadelphia, and Baltimore, with the view of secur¬ 
ing appropriate sites and buildings as quarantine stations for im- 
