262 LOUIS PASTEUR. 



METHOD OF DISCUSSION AND 

 CONTRADICTIONS. 



EVERY new discovery produces a revolution in general 

 ideas ; a revolution gladly hailed by some, but opposed 

 by others as disturbing their habits of thought and 

 reasoning. Those also who are thrown out in their 

 calculations, while engaged in working out a problem 

 in any way similar to the one that has been solved, 

 too often atone for their dilatoriness by furious denial 

 of the newly asserted truth. The great fact of the 

 attenuation of virus, the artificial production of the 

 vaccines of chicken cholera and of splenic fever, the 

 importance of their employment for the preservation 

 of animals from these diseases, excited throughout 

 the world a surprise and enthusiasm which passionate 

 critics soon sought to disparage. The fiercest attack 

 was from Germany. It commenced immediately after 

 Pasteur's triumph at the International Congress of 

 Medicine held in London in 1881. The German 

 doctor Koch and his colleagues, MM. Gaffki and 



