GEORGE JARVIS BRUSH. 855 



training and study, and accordingly in November of 1853 he sailed 

 for Germany. Here he spent the years 1854 and 1855, first at Munich 

 studying with Leibig, von Kobell, and Pettenhofer, and later at the 

 Mining School at Frieberg, Saxony. In 1855 he was elected Pro- 

 fessor of Metallurgy in the Sheffield Scientific School of Yale and in 

 order to fit himself more fully for this position he spent another year 

 abroad studying at the Royal School of Mines in London, and visiting 

 the principal mines and smelting works in Great Britain, and on the 

 continent. He entered upon his duties at Yale in January, 1857. 

 In 1864 his chair was broadened to include mineralogy, and later, in 

 1871, it was finally limited to the latter subject. 



He long acted as secretary and treasurer of the Scientific School, 

 and in 1872 he was made its director and served in this capacity until 

 1898, or through a period of twenty-four years. Although at this 

 time he resigned his active administrative duties he continued to 

 serve as treasurer and secretary to the board of trustees until 1900, 

 when he gave up the duties of secretary, becoming President of the 

 Board. He gave up the treasurership in 1904, but remained president 

 until the end, presiding at the Annual Meeting in November, 1911. 

 After a brief period of failing health, owing to a heart trouble, which 

 first appeared in the spring of 1911, he passed quietly away on Febru- 

 ary 6th, 1912. 



In 1864 he was married to Harriet Silliman Trumbull, who died in 

 1910. Three daughters were born to them. 



As a scientist Professor Brush's name is closely associated with 

 mineralogy. He showed a keen interest in this subject even as a boy 

 when he collected minerals with Mr. Gold, and it was always the 

 branch of science that interested him most. He was among the first 

 in this country to apply refined methods of chemical analyses to the 

 study of minerals, and his work was the fore-runner of the great 

 amount of skilful and valuable work later carried on in the Sheffield 

 laboratory by Brush's distinguished colleague and successor as Pro- 

 fessor of Mineralogy, S. L. Penfield. The results of his researches 

 made a lasting impression on the development of mineralogical science, 

 and the effects of his teaching were carried by his many students 

 throughout the land. Besides numerous papers relating to separate 

 minerals and to mineral localities, he published in 1874 a "Manual of 

 Determinative Mineralogy" patterned after the German tables of 

 von Kobell. A later edition appeared in 1878. This book was later 

 enlarged and extended by Professor Penfield, and under the joint 

 names of Brush & Penfield is today the great standard work on de- 



