RT Journal Article SR Electronic T1 A proposed new method in solar spectrum analysis JF American Journal of Science JO Am J Sci FD American Journal of Science SP 140 OP 146 DO 10.2475/ajs.s3-14.80.140 VO s3-14 IS 80 A1 Langley, S. P. YR 1877 UL http://www.ajsonline.org/content/s3-14/80/140.abstract AB