RT Journal Article SR Electronic T1 Contributions to mineralogy JF American Journal of Science JO Am J Sci FD American Journal of Science SP 204 OP 211 DO 10.2475/ajs.s3-32.189.204 VO s3-32 IS 189 A1 Hidden, William Earl YR 1886 UL http://www.ajsonline.org/content/s3-32/189/204.abstract AB With crystallographic notes by Des Cloizeaux, A.