500 TRANSLATIONS FROM .CONTINENTAL JOURNALS. 
their manifestations, but the same as to their first orisin. 
It is said, and with reason, that a confusion in words causes 
a confusion in things. It is a well-known fact, that the 
ditferent names given to the malady of the horse, which, 
according to Jenner, transmits the vaccine, have been one of 
the principal causes of the differences that have prevailed, 
and still prevail, in science in relation to the origin of vac¬ 
cine. Jenner thought himself more authorised in employ¬ 
ing the word sore heels, inasmuch as it is generally in 
use in England, as may be seen in the works of a contem¬ 
porary veterinary writer of Jenner—Delabere-Blaine. The 
word Javart is the one which has certainly the most contri¬ 
buted to complicate the history of the origin of vaccine. M. 
Bouley has told you that the word Javart was not in the text 
of Jenner; but what he has not told you is, that the trans¬ 
lator himself has recognised the error he has made in ren¬ 
dering grease by Javart. He confessed, in 1803, that he had, 
perhaps, too lightly believed that the word Javart of the 
French was the malady of Jenner. This error, I repeat, 
has contributed much to propagate the doubts and incre¬ 
dulity relative to the origin Jenner gave to vaccine. I have 
said above that there were clinical facts in the annals of 
science, and also several experiments, which have established 
the position that the matter of grease in the horse when 
inoculated has produced the vaccine disease in the human sub¬ 
ject and in the cow. I will not here recall the text, which 
would be too long, but will confine myself to citing the 
experiments of Viborg and Coleman, which were made soon 
after the discovery of vaccine ; after which I will acquaint 
you with those which have been attempted \^ithin the last 
few years in Germany. This is how Viborg expresses him¬ 
self : I have informed the Society that at different times 
I repeated the experiments of Loy and Sacco without 
being able to confirm them, and I came to the supposition 
that the cause of the difference was from not having taken 
the matter of grease which I employed at the same period of 
the malady. The grease gives oflf at first a limpid serosity, 
which, at a more advanced period, becomes mixed with 
pus. It is this last matter that I employed. I resolved 
to try the matter of the first period, but from the un¬ 
frequent occurrence of the malady I only met with one 
case in which the disease had not yet passed this phase, and 
that was last spring. I found the skin in the bend of the 
fetlock covered with red granulated eminences, from which 
exuded a serous liquid of a peculiar odour. The horse pre¬ 
sented besides a slight fever and loss of appetite. 1 inocu- 
