THE BACTERIA IN CONTAGIOUS MALADIES. 159 
known. Let us note, however, that Fuchs, Brau- 
ell, Pollender, and Delafond, had remarked some 
corpuscles in the blood of animals attacked with 
charbon. Prof. Delafond made, twenty years ago, 
some researches, which he communicated to the 
Central Society of Veterinary Medicine, upon the 
rods of sang du rate. Davaine, who had observed, 
with Roger, the presence of rods in the blood of 
charbon as early as 1850, did not attach any im- 
portance to the fact. After the work of Pasteur 
in 1861, he resumed his researches and the results 
which he obtained were communicated to the Acad- 
emy of Sciences the 27th of July and the 10th of 
August, 1863, then the 22d of August, 1864. His 
experiments established the fact that the blood of 
animals attacked with charbon contains organisms 
(elements figurés), and that, injected into a healthy 
animal, it kills it by reproducing the same symp- 
toms. There remained a step to make, to prove 
that the bacteria alone possessed the infective 
power, even in epidemic cases. Notwithstand- 
ing the labors of Signol (1864) corroborating his 
discoveries, Davaine did not fail to find oppo- 
nents. Leplat and Jaillard made known the re- 
sults of their experiments, according to which 
the bacteria were not the cause of sang de rate. 
In 1867, Bouley and Sanson, and in 1870, Bail- 
let, studied the nature of the malady known under 
the name of mal de montagne. 
Klebs, in Switzerland, having, with Tiegel of 
the Pathological Institute of Berne, made some 
negative injections with filtered blood (of char- 
