GROWTH OF MINERALOGY 277 



of his contributions are the " Memoir on Emery" (1850), 

 a series of papers on the "Reexamination of American 

 Minerals" (1853) written with the collaboration of 

 George J. Brush, and his "Memoir on Meteorites" 

 (1855). 



George J. Brush entered on his scientific career at the 

 moment when science and scientific methods of research 

 were just beginning to be appreciated in this country, 

 and he soon became one of the leading pioneers in the 

 movement. While his half century of active service was 

 largely occupied by administrative duties in connection 

 with the Sheffield Scientific School, his interest in min- 

 eralogy never flagged. His papers on mineralogical sub- 

 jects number about thirty, all of which were published in 

 the Journal. These began in 1849, even before his 

 graduation from college, and continued until his last 

 paper (in collaboration with S. L. Penfield) appeared in 

 1883. Three of the early papers were written with 

 J. Lawrence Smith as noted above. These papers first set 

 in this country the standard for thorough and accurate 

 scientific mineral investigation. Later in life he was 

 active in the development of the remarkable mineral 

 locality at Branch ville, Conn., and, with the collaboration 

 of E. S. Dana, published in the Journal (1878-90) five 

 important articles on its minerals. This locality, with the 

 exception of the zinc deposits at Franklin Furnace, N. J., 

 was the most remarkable yet discovered in this country. 

 Nearly forty different mineral species were found there, 

 of which nine (mostly phosphates) were new to science. 

 There has certainly been no other series of descriptive 

 papers on a mineralogical locality of equal importance 

 published in this country. 



In addition to publishing original papers, Brush did 

 considerable editorial work in connection with the fourth 

 (1854) and fifth (1868) editions of the System of Miner- 

 alogy and the Appendices to them. His Manual of 

 Determinative Mineralogy, with a series of determinative 

 tables adapted from similar ones by von Kobell, was first 

 published in 1874. It was revised in 1878 and later 

 rewritten by S. L. Penfield. This book did much to make 

 possible the rapid and accurate determination of mineral 

 species. Throughout his life, Brush was an enthusiastic 



