RT Journal Article SR Electronic T1 On the relative wavelength of the lines of the solar spectrum JF American Journal of Science JO Am J Sci FD American Journal of Science SP 182 OP 190 DO 10.2475/ajs.s3-33.195.182 VO s3-33 IS 195 A1 Henry A. Rowland YR 1887 UL http://www.ajsonline.org/content/s3-33/195/182.abstract AB