﻿Vol. 6 I.] ANNIVERSARY ADDRESS OF THE PRESIDENT. xllX 



parasitic cones, on the site now occupied by the bay, that this 

 volcano was clothed with vegetation, that its lower slopes were 

 inhabited by a prehistoric race whose dwellings may now be seen 

 beneath fragmental volcanic rocks, and that the present bay was 

 formed by a grand paroxysmal eruption which destroyed the 

 central cone. 



In 1880, Fouque was made a member of the Commission whose 

 duty it is to prepare a detailed geological map of France, and, 

 as his share of this important work, carried out during five 

 consecutive years a survey of the Cantal. 



In collaboration with M. Michel Levy he brought out the well- 

 known treatise on microscopical mineralogy, which has done so 

 much to advance petrographical knowledge, and in which the 

 mutual relations of the minerals of typical igneous rocks are shown 

 in a series of coloured plates. 



One of the most recent contributions to science by Prof. Fouque 

 is an elaborate treatise on the optical characters of felspars, in 

 which a new diagnostic method is introduced, depending on the 

 observation of the angles of extinction in sections perpendicular 

 to the two bisectrices. 



He held the professorship of Geology in the College de France 

 for more than a quarter of a century, and throughout that long 

 period never failed to interest his audiences in the results of the 

 work on which he was engaged. 



Although much of his work was done in the laboratory, he was 

 an indefatigable field-geologist, and during his long sojourn in 

 Auvergne gained the respect of the inhabitants by his simple 

 mode of life and by the physical energy with which he carried out 

 the arduous task of surveying the region. He was passionately 

 devoted to science, and always ready to discuss the questions in 

 which he was interested with fellow-workers of all nationalities, 

 and to render them any assistance in his power. 



He died suddenly, on the morning of March 7th, 1904. 



[J. J. H. T.] 



Charles Emersox Beecher, elected a Foreign Correspondent of 

 this Society in 1899, died suddenly of heart-disease on February 14th, 

 1904, in his forty-eighth year. Beecher's high reputation as a 

 palaeontologist of Invertebrata depends neither on a multiplicity of 

 papers, nor on numerous descriptions of new species. Trained in 

 precise observation as assistant to James Hall, and combining an 



