TRANSLATIONS FROM CONTINENTAL JOURNALS. 613 
Derations. Animals which were inoculated with virus from the 
sixth to the thirteenth generation, contracted the malady in so 
benign a form that none of them succumbed to it. These last 
experiments have proved that animals inoculated and cured 
could be introduced with impunity amongst the diseased herd. 
The inoculations made at the farm of Hidirim, in 1853, 
have demonstrated that the virus from the second generation 
produces a benign form of the malady. Professor Jessen 
affirms that the inoculations practised in the different parts of 
new Russia have had a most favorable result, but that more 
to the north, that is, further from the original seat of the dis¬ 
ease, it assumed a more malignant character, and that the losses 
from inoculation were more numerous. At the veterinary 
establishment of Charkoff, they inoculated in eight times, and 
in eight different districts, 1859 animals, from which they 
have been enabled to ascertain that the virus from the third ge- 
Deration produced a more benign malady; and, moreover, they 
acquired the conviction that those animals which had been 
effectually inoculated could with impunity mix with the 
infected herds. Of the above number only sixty died. 
Professor Seifman, of the veterinary school at Warsaw, 
says that typhus is to be combated—1st, by a strict quarantine 
so as to prevent the ingress of infection, wherever it may be; 
2nd, by the general slaughter of the infected and suspected 
animals : but this latter being only a palliative, the losses 
sustained by the different invasions of this terrible malady 
have been enormous. It was in consideration of these losses 
that in 1853, both in Poland and Russia, researches were 
made to ascertain whether inoculation would not to a certain 
extent be efficacious in preventing the evil. At the present 
time the expectations then raised seem well founded, accord¬ 
ing to a memoir by Serwieff, veterinary director of the medi¬ 
cal department of the Ministry of the Interior. 
The first experiments on inoculation were made in 1853, 
by order of the government, in the neighbourhood of Odessa, 
at the farm of Hidirim, by Professor Jessen, director of the 
veterinary school at Dorpat, and they have been continued 
ever since, without interruption, in different districts, viz., in 
new Russia, in the governments of Charkoff, Koursk, Kasan, 
Yiatka, Mohileff, Livonia, Smolenski, and Kirgis. The 
object of these experiments was to solve the following 
questions:—1st. Are the animals of the genus Bos, liable to 
contract this malady once or several times in their lives? 
Experiments demonstrate that typhus only attacks them 
once. 2nd. Can the action of the virus be so weakened as 
that, when introduced, it will only provoke a feeble access of 
