168 LOUIS PASTEUR. 



STUDIES ON BEER. 



THE war was over. Little by little the life of the 

 country was resumed, and with returning hope the 

 desire and necessity for renewed work. After two 

 years of infirmity, Pasteur at length began to feel 

 the recovery of health. It was like a slow and gentle 

 renewal of all things. He wished to return as soon 

 as possible to his laboratory in Paris to put into exe- 

 cution projects of experiments which had long been 

 working in his brain. At the moment when he was 

 preparing to start, the rebellion of the Commune broke 

 out. M. Duclaux, who had become Professor of the 

 Faculty of Sciences in Clermont-Ferrand, offered the 

 use of his laboratory to his old master. Pasteur ac- 

 cepted it. Eager to commence an investigation which 

 would bring him again to the study of fermentation, 

 he attacked the diseases of beer. But it was not only 

 for the purpose of creating a new link between these 

 researches and his former ones that he occupied him- 

 self with this subject, he was also influenced by a 

 somewhat patriotic idea. He dreamt of success in an 



