30 PASTEUR 



in Sulphate of Potash, Researches in Dimorph- 

 ism, Memorandum on the Relation which may 

 exist between Crystalline Form and Chemical 

 Composition and on the cause of Rotary Polari- 

 zation. 



These austere labours, this life of the labora- 

 tory, which kept his mind constantly occupied 

 and concentrated on problems difficult of solu- 

 tion, nevertheless in no wise isolated him from 

 the vital interests of the French nation. In 

 common with all other young students, he had 

 thrilled at the proclamation of the Republic in 

 1848, and it was with enthusiasm that he 

 greeted the words, "Liberty, Equality, Fra- 

 ternity." Light of purse though he was, our 

 young savant gave to his country his entire 

 savings, one hundred and fifty francs, and he 

 was delighted to serve in the national guard. 

 It was a duty which he joyfully performed on 

 behalf of his native land, for under all circum- 

 stances Pasteur was a man who did his duty. 



A cruel bereavement was. destined shortly 

 afterwards to interrupt his activities during 



