444 PROCEEDINGS OF THE ACADEMY OP [1894. 



Auguste Daubree, of France, whom it has selected by unanimous 



vote for the honor. 



Your Committee takes great pleasure in recommending that the 



Hayden Medal of this year be awarded by the Academy of Natural 



Sciences to Professeur Gabriel Auguste Daubree, Membre de I'lnsti- 



tut et Grand Officier de la Legion d'Honneur. 



Very respectfully, 



J. P. Lesley, 

 Bekj. Smith Lyman, 

 Angelo Heilpein, 

 Theo. D. Rand, 

 Persifor Frazer, 



Chairman. 



• 



Gabriel Auguste Daubree was born in Metz, June 25, 1814, 

 and is therefore now in his eighty-first year. He graduated from 

 the Ecole Polytechnique in 1834 and immediately received a com- 

 mission to assist in the geological exploration of Algeria. He was 

 called to the chair of geology in Strasbourg in 1839 and was Dean of 

 its Scientific Faculty in 1852. He was appointed Engineer-in-Chief 

 in 1855. In 1861, upon the death of the distinguished Cordier, he 

 was selected to replace him in the Museum of Natural History, and 

 as Professor of Mineralogy in the Ecole des Mines as well as in the 

 Academic des Sciences in Paris. 



He was Director of the Ecole nationale des Mines for a number 

 of years, and while filling this responsible office was invariably 

 courteous and generous in allowing foreigners the privilege of using 

 its collections and library, and in assisting them in all ways to attain 

 what they sought. 



His writings have been numerous, original, and important, and 

 it is to his genius and patience that we owe much of our insight into 

 the intricate causes of crystalline structure, and the creation of the 

 branch of experimental geology. 



In 1841 he published his "Amas des minerals d'etain," in which 

 a new theory was announced of the origin of the puzzling distribu- 

 tion of tin in its ores. In 1846 he published researches in Norway, 

 and a theory of the occurrence of gold in the Rhine valley. 



At intervals he published a long series of memoirs of exceptional 

 originality and interest, among which may be mentioned "Arsenic 



