RT Journal Article SR Electronic T1 On the spectrum of the corona JF American Journal of Science JO Am J Sci FD American Journal of Science SP 343 OP 345 DO 10.2475/ajs.s3-16.95.343 VO s3-16 IS 95 A1 W. T. Sampson YR 1878 UL http://www.ajsonline.org/content/s3-16/95/343.abstract AB