RT Journal Article SR Electronic T1 James Dwight Dana JF American Journal of Science JO Am J Sci FD American Journal of Science SP 329 OP 356 DO 10.2475/ajs.s3-49.293.329 VO s3-49 IS 293 A1 Edward Salisbury Dana YR 1895 UL http://www.ajsonline.org/content/s3-49/293/329.abstract AB