RT Journal Article SR Electronic T1 Professor Elias Loomis JF American Journal of Science JO Am J Sci FD American Journal of Science SP 427 OP 455 DO 10.2475/ajs.s3-39.234.427 VO s3-39 IS 234 A1 Anonymous YR 1890 UL http://www.ajsonline.org/content/s3-39/234/427.abstract AB