332 
W. SILBERSCHMLDT. 
Upon plates of gelatine the colonies readily appear in 24 
or 48 hours. With the exception of the more rapid develop¬ 
ment they do not offer well-marked differential characters 
from the swine plague ; they are generally clearer, rounded, 
with more regular borders. There is no liquefaction. Upon 
gelosis the culture is much more apparent, thicker than that 
of the swine plague; the larger colonies have a more whitish, 
shying, creamy aspect. The bouillon clouds move, and at 
times present a little foaming band (collarette), which has 
also been seen on the surface of the liquid in some cultures 
of swine plague. Peptonized water gives an analogous cul¬ 
ture. There is no indol formation in young cultures. In 
glucosed bouillon the culture made with a little carbonate of 
lime has regularly given rise, after 24 or 48 hours, to a. great 
formation of gas, and the quantity of carbonate of lime in 
the solution was greater than in the witness tube. The cul¬ 
ture upon potatoes is very abundant; yellowish first, it soon 
appears under the form of a shying thick brown crust. As : 
with swine plague , milk is not coagulated by the culture of 
the microbe of hog cholera. 
In the blood the two microbes present generally the same 
aspect as in the culture. They have seemed to me of dimen¬ 
sions somewhat larger and often by couples. In cases of J 
rapid death their number is much larger than that of the 
corpuscles of the blood. 
For hog cholera the growth in striae upon gelosis is spe¬ 
cially abundant when successive cultures are made ; if, on the 
contrary, one passes the animal several times without having 
recourse to the culture, the first sowing upon artificial media 
gives a culture less well filled than ordinarily and lesembling 
that of swine plague. In proceeding in the same way with 
swine plague , I have failed, after several injections of viru¬ 
lent blood, to obtain a trace of culture with a blood very 
rich with microbes. The colonies became apparent when 
I had covered the surface of the gelosis with a little of the 
blood. 
As to the resistance of the two microbes to various agents, 
I can confirm the data of the American authors. 
