588 
EXTRACTS FROM EXCHANGES. 
successful step forward. The principle of the method used by 
the authors is as follows: (i) Immunization with the bile of 
animals • dead with rinderpest. Injections of bile give only 
uncertain and unreliable results, vaccinated animals taking 
sometimes the disease under a fatal form and being able to 
propagate the disease; in other cases, they are not immunized 
01 are only for a short time. (2) Immunization with serum 
1 his is a better method ; is entirely harmless; vaccinated ani¬ 
mals show no reaction, and are protected from contagion. 
Serum is furnished by animals that have resisted the disease 
taken by contagion or inoculation. This immunity is rein¬ 
forced by intravenous injections of virulent blood with increas¬ 
ing doses, which for young bovines can be as high as 4 to 6 
litres, according to size. The virulent blood is taken, with the 
ordinary cases, at the last period of the disease, when the tem¬ 
perature goes down, but before collapse sets in. According to 
the size of the animal to be immunized, from 50 to 150 c.c. of 
serum are injected. Immunity lasts from four to six months. 
(3 ) Immunization with serum and injections of virulent blood. 
2/10 of c.c. of virulent blood are injected in the neck of adult 
bovines, and 1/10 of c.c. to sucking calves, and two to four 
hours after, in another region of the body, the inguinal regions, 
for instance, from 20 to 40 c.c. of serum are injected. Accord¬ 
ing to the quantity of injected serum, there is no reaction 
following, or at least very small. Some ten days after, a new 
injection of 2/10 of c.c. gives rise to no reaction; immunity is 
reinforced, and may last several years. (4) Serotherapy. If 
200 c.c. of serum are injected to animals affected by rinderpest 
in the first period, that is the first or second day of the elevation 
of temperature, surprising results are frequently obtained. The 
treatment by serum may also succeed, although with less cer¬ 
tainty, m a more advanced period of the disease. A commission 
appointed by the government to investigate the work of the 
authors, has repoited favorably on it, with the restrictions that 
the experiments have not been sufficiently extensive to justify 
the admission of the method in daily practice.— (Archiv. Veterin. 
Naouk and R. de M. V.) 
Epizooty of Eichfn [By Kramaviev \.—The author has 
observed an outbreak of this disease in a herd of 240 horses, 
from one to five years old, living together on a range. These 
animals were, turned out on April 15, and at the end of May 
were found diseased. On June 11, 196 of them were affected, 
he disease seems to have started after the introduction of a 
