16 
TRANSLATIONS FROM FOREIGN JOURNALS. 
long quarantine they ought to be subjected to, to prevent its dis¬ 
asters, without interfering with the breeders; and again it is not 
possible, at first sight, to recognize the animals upon which it is 
in the period of incubation, which may last twenty days. 
It is thus a serious affection, and worthy of all attention. 
Preservative inoculation is resorted to in some countries, but in 
meridional districts at least, has proved scarcely less fatal than 
the contagion itself, and many have given it up. 
A veterinarian, M. Loubet, having sent me the serosity of a 
pustule of small-pox, I diluted it to the twentieth, at last, and in¬ 
oculated a yearling lamb with it. After ten days it gave large 
local pustules of the size of a five francs piece* and a general 
eruption. It is from these pustules of inoculations that I obtain¬ 
ed the serosity which I cultivated. 
The cultures were made in bouillons of meat of sheep, beef, 
rabbits, and -even of yeast. It is in that of rabbits and sheep that 
they succeeded best. After two or three days of culture the 
liquids were loaded with bacteries and spores; on the surface of 
the liquid, pellicles are formed, containing them in great quantity ; 
then after four or five days, the microbes fell to the bottom in the 
shape of spores, and the liquid dears up. 
The microbe of small-pox then presents itself under two con¬ 
ditions, that of bacteria and that of spores. Bacteries are very 
small the first day of cultivation, probably not more than one, 
three or four thousandths of a millimeter in length. They are 
very active and are seen moving rapidly under the microscope. 
They then lengthen and subdivide. Seldom are more than two 
segments seen united; sometimes, three or four ; usually one of 
them is larger than the other. From the second to the third day 
of culture, the longest of the two bacteries is seen giving off two 
spores, one at each end, and sometimes another in its middle; the 
smallest bacteria usually has only one. It appears then as a 
minute dumbbell, the spore having a larger diameter, and sometimes 
reaching the one thousandth of a millimeter; it is slightly oval, 
and very refracting, smaller than that of anthrax. First cultures 
'About the dimensions of a silver dollar. 
