RT Journal Article SR Electronic T1 On the optical character of the chondrodite of the Tilly Foster Mine, Brewster, New York JF American Journal of Science JO Am J Sci FD American Journal of Science SP 139 OP 140 DO 10.2475/ajs.s3-11.62.139 VO s3-11 IS 62 A1 Dana, Edward Salisbury YR 1876 UL http://www.ajsonline.org/content/s3-11/62/139.abstract AB