234 



PASTEUR : THE HISTORY OF A MIND 



bacteria appear in the blood before death instead of 

 after death as in other diseases. 



The following year he took a new step in the wrong 

 direction. He stated that inoculation with the blood 

 of a horse having anthrax had caused a deadly anthrax 

 in the inoculated animal, although this blood did not 



FIG. 20. Bactendium of anthrax. 

 In artificial cultures. In the blood of a diseased animal. 



contain bacteridia. Evidently, therefore, these little 

 rods were neither the contagion nor the carrier of the 

 contagion nor even, one might add, the necessary com- 

 panions of it. Brauell, therefore, undid what Pollender 

 had done. Henceforth the little rods retained only a 

 diagnostic or a prognostic value in certain cases, that is to 



