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 Eoger, 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 figures), 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- 



