RT Journal Article SR Electronic T1 Note on the use of a diffraction "grating" as a substitute for the train of prisms in a solar spectroscope JF American Journal of Science JO Am J Sci FD American Journal of Science SP 472 OP 484 DO 10.2475/ajs.s3-5.30.472 VO s3-5 IS 30 A1 C. A. Young YR 1873 UL http://www.ajsonline.org/content/s3-5/30/472.abstract AB