146 LOUIS PASTEUR 



University of Bonn conferred upon him the diploma 

 of Doctor of Medicine, in acknowledgement of his 

 work on the role of micro-organisms, but unwilling 

 to retain a parchment in which his own name ap- 

 peared along with that of the German Emperor he 

 returned the diploma with a caustic letter explain- 

 ing the reasons for his action. His bitterness was 

 probably all the more intense because of his in- 

 ability to take an active part in the defense of his 

 country. 



Having had no news of his son, now a young man 

 of 1 8 serving in the Army of the East, Pasteur 

 went to seek him and was overjoyed at finding him 

 safe among the disorganized retreating soldiers. 

 He accompanied his son to Geneva and then went 

 to Lyons and soon afterward to Royat where he 

 stopped with his old collaborator Duclaux who was 

 now Professor of Chemistry in the Faculty of Clere- 

 mont-Ferrand. Shortly before this Pasteur had 

 written to Duclaux in the following terms: "My 

 head is full of the most beautiful projects for re- 

 search. The war has compelled my brain to lie 

 fallow. Now I am ready for new productive 

 labors; but alas, I may be laboring under an illu- 

 sion! In any case I shall try. Oh, why am I not 

 rich, a millionaire] I would say to you, to Raulin, 



