376 PROCEEDINGS OF THE ACADEMY OF [1899. 



shortly thereafter transferred to him the instruction in paleon- 

 tology. In 1897 he was admitted to the degree of Emeritus. 



Having published, for the use of his pupils, an Atlas of Crystal- 

 lography and a Description of the Crystalline System, he issued ia 

 1858 the Prodromus of a Geological Description of Belgium, a 

 model of clearness, precision and science, which exei'cised the great- 

 est influence on the study of geology in Belgium. 



In 1874 he founded the Geological Society of Belgium, of which 

 he has been the General Secretary from its origin to the year 

 1898, when the advance of years induced him to retire. He was 

 made Honorary General Secretary, and a medallion in hronze was 

 presented to him with his portrait in profile. He was made Chev- 

 alier of the Order of Leopold in 1870, Officer in 1881, and Com- 

 mander in 1892. 



He became a member of the Academy of Science in 1854, was 

 its President in 1870. He is President of the Committee of Na- 

 tional Biography (of which he has been a member since its origin 

 in 1860), to which he has furnished more than eighty notices. 



In cooperation with the Geological Society, he suggested the 

 preparation of a detailed geological map of Belgium at the expense 

 of the State. This resulted in a suitable recognition of capable 

 geologists, so that in ten or twelve years a map consisting of 226 

 sheets on a 40, too ^^ale will have been completed. He translated 

 i\\Q Revieiv of Pyrogenetic Minerals, of Gurlt (1857); the memoir 

 of Bevrich on the Tertiary Series of North Germany (1857) ; The 

 Chapter of the Siluria of Sir Roderick Murchison : The Paleozoic 

 Terranes of the Rhenish and Belgian Provinces (1860); The 

 History of the Names " Cambrian'^ and '' SiluriaJi," by the regretted 

 T. Sterry Hunt (1875); and finally the Paleocene Fauna of 

 Copenhagen, by A. von Koenen (1886). 



He also made numerous excursions abroad, notably to Devon- 

 shire and Wales, which enabled him to establish the correlation of 

 the Cambrian formations of England and Belgium (1873). At 

 the first International Geological Congress, held in Paris in 1879, 

 he was appointed Secretary of the Committee on Classification and 

 Uniformity of Nomenclature, and this appointment was I'epeated 

 at Bologna, Berlin and London. The reports which he presented 

 to the Congress of Bologna and Berlin are distinguished by 

 impartiality, clearness and method. 



