134 LOUIS PASTEUR 



found our master more and more disturbed. He 

 kept us so far from his thoughts that we did not 

 understand his inquietude until one day he ap- 

 peared, almost in tears, and settling himself dis- 

 couraged into a chair exclaimed, 'Nothing has been 

 accomplished. There are two diseases.' 



This fact, which Pasteur had suspected for some 

 time, made it apparent that the investigations had 

 been proceeding on the basis of a wrong assump- 

 tion. It was necessary for Pasteur to retrace his 

 steps and to repeat many experiments in the light 

 of a new viewpoint. But notwithstanding the dis- 

 concerting effects of this discovery, the recognition 

 of the existence of a distinct malady hitherto con- 

 fused with pebrine had its reward in resolving 

 many contradictions and inconsistencies in Pas- 

 teur's previous results. 



This disease now recognized as distinct for the 

 first time is commonly designated by the name of 

 "tnorts-flats" or "flacherie." Like pebrine it is a 

 peculiarly fatal disease, readily contagious, and 

 having its peculiar complex of symptoms. It is 

 primarily an intestinal infection accompanied by 

 the development of enormous numbers of its char- 

 acteristic bacteria in the alimentary canal. 



Going back over previous work it became evident 



