RT Journal Article SR Electronic T1 On the spectra and composition of the elements JF American Journal of Science JO Am J Sci FD American Journal of Science SP 350 OP 368 DO 10.2475/ajs.s2-42.126.350 VO s2-42 IS 126 A1 Gustavus Hinrichs YR 1866 UL http://www.ajsonline.org/content/s2-42/126/350.abstract AB