RT Journal Article SR Electronic T1 Color photography by Lippmann's process JF American Journal of Science JO Am J Sci FD American Journal of Science SP 388 OP 390 DO 10.2475/ajs.s3-42.251.388 VO s3-42 IS 251 A1 C. B. Thwing YR 1891 UL http://www.ajsonline.org/content/s3-42/251/388.abstract AB