216 PASTEUR 



DAGUERRE, LOUISE JACQUES MENDE, inventor of 

 the diorama and one of the inventors of pho- 

 tography, born at Cormeilles-en-Parisis (Seine- 

 et-Oise) in 1789, died at Bry-sur-Marne in 1851. 



DAVAINE, CASIMIR JOSEPH, French physician, 

 born at Saint- Amand-les-Eaux in 1812, died at 

 Garches in 1882, author of remarkable treatises 

 on experimental physiology. His discovery, in 

 1850, of the bacteria of anthrax makes him the 

 true precursor of Pasteur. 



DELAFOSSE, GABRIEL, French mineralogist, born 

 at Saint-Quentin in 1796, died at Paris in 1878. 

 He occupied the chair of mineralogy in the Paris 

 Faculty of Sciences and in the ficole Normale, 

 and in 1857 was elected member of the Academy 

 of Sciences. Delafosse devoted himself in a very 

 special way to the study of crystalography. 



DUMAS, JEAN BAPTISTE, chemist, born at Alais 

 (Gard) in 1800, died at Cannes in 1884. He was 

 elected member of the Academy of Sciences in 

 1832, then professor in the Faculty of Sciences 

 of Paris, the Faculty of Medicine and the Col- 

 lege de France. He was the founder of the Nor- 

 mal School of Arts and Sciences. Dumas was 

 a member of the Institute, permanent secretary 

 of the Academy of Sciences, and member of the 

 Academie Franchise (1875). He was the author 



