RT Journal Article SR Electronic T1 Method of illustrating the formation of diffraction bands JF American Journal of Science JO Am J Sci FD American Journal of Science SP 5 OP 6 DO 10.2475/ajs.s3-29.169.5 VO s3-29 IS 169 A1 Moreland, S. T. YR 1885 UL http://www.ajsonline.org/content/s3-29/169/5.abstract AB