390 
GEORGE FLEMING. 
it lias been carried to Belgium, where it 1ms attacked a large num¬ 
ber of horses. Horse-pox has also prevailed as an epizooty for 
two years, and is now prevalent at Montreal. Many persons have 
been accidentally inoculated, and the vacciniferous character of the 
disorder has been established by medical and veterinary authori¬ 
ties. The outbreak is described in the Veterinary Journal for 
August, 1877. Last October, immediately before leaving my late 
regiment, the Second Life Guards, I had four cases of the disease 
among young horses just joined, and my farrier-major was acci , 
dently inoculated on the finger. Surgeon Hensman, of the regi¬ 
ment, considered the case one of severe vaccination. The details 
are recorded in the Veteinnary Journal for March, 1880. 
So that since 1864, when the nature of horse-pox was forever 
settled by the observations and experiments of Bouley, and the 
discussions that ensued thereon at the Paris Academy of Medi¬ 
cine, the history of the malady has been largely supplemented by 
contributions from observers and experimenters in Europe and 
America, and Jenner’s statement has been admitted by all who 
have studied the subject to be true, except in one particular—the 
“ horse-pox ” or “ constitutional grease ” being the source of cow- 
pox. In this only was Jenner in error. The two diseases are 
perfectly independent of each other. Cow-pox appears where 
there are no horses, or possible contact with horses, and where the 
men who attend upon these do not milk cows. It has frequently 
been observed that horse-pox prevails on a farm or in a locality, 
and no cow-pox is seen there ; while the last-named disease may 
affect a number of cows in a dairy, and the horses be entirely free 
from horse-pox. Hering, for instance, states that cow-pox is very 
far from rare in Wurtemberg, while grease ( mauJce ) is extremely 
uncommon ; that men who work horses do not milk the cows, this 
office being undertaken by women in that essentially milk produc¬ 
ing country; and that the majority of the proprietors of cows 
which had been affected with cow-pox had no horses.* In none 
of the recorded outbreaks of horse-pox has anything ever been 
said as to the existence of cow-pox, and no attempt has ever been 
# “ Gewiss dergrosste Theil uuserer Eigenthumer von Kuhen mit originare 
H Pocken hat gar keine Pferde.” Op. eit., p.9. 
