622 
W. S1LBERSCHMIDT. 
portance. An animal where the disease is present is no 
capable, in the opinion of the Board, of many years of nsefu 
service. To be sure, it may live for years; it may perforn 
its ordinary functions to a profitable extent, if the owner i: 
allowed to sell its products; but it is nevertheless a source o 
menace to the health of the community. There is, therefore 
but one course to pursue with such an animal, and that is tc 
destroy it .”—Cattle Commissioners Public Document , p. 5 1 * 
“ During the past year 160 animals have been destroyec 
for being affected with glanders or farcy.” 
(To be continued .) 
CONTRIBUTION TO THE STUDY OF SWINE PLAGUE, HOG CHOL- 
ERA AND PNEUMOENTERITIS OF SWINE, 
By Dr. W. Silberschmidt. 
1 
(<Continued from page 567.) 
RESISTANCE OF RABBITS VACCINATED AGAINST ONE OF 
THE DISEASES TO THE VIRUS OF THE OTHERS. 
Let us arrive at the principal object of our work. It was 
to know how animals vaccinated against one of the diseases 
would resist to the two others. 
The microbe of swine plague being the most virulent, we 
have experimented specially upon rabbits vaccinated against 
the virus. I will begin by relating my experiments. 
No. 145.—30-XI, ik-950. Vaccinated with 7.5 cc. of sterilized cultures injectec 
in four doses ; test against swine plague the 21-III. The witness dies in 20 hours.' 
The 4-IV, ik-990 ; injection of 1.20 cc. of hog cholera culture killing two witnesses 
in less than 24 hours ; 2d test of hog cholera ; the 7-V (2k- 20). The witness dies ir 
40 hours ; 3d test, the 21-V ; 4th test, the 8-VI. A month and a half later, this ; 
same rabbit resists a second injection of swine plague virus, which kills the witness 
in 24 hours. 
No. 198.—Vaccinated by 3 injections of diluted blood of swine plague, sterilized 
by contact with thymic acid. Resists to five tests of swine plague virus. A month 
after the last injection, the rabbit receives 1.4 cc. of virulent blood of hog cholera- 
without presenting morbid symptoms ; the witness dies in less than 20 hours. 
No. 221.—Vaccinated by 6 injections of diluted blood, sterilized by contacl t 
with thymic acid. Resists to two tests of virulent culture of swine plague. A month 
and a half after the last test, injection of 2.10 cc. of hog cholera culture, which kills 
