RT Journal Article SR Electronic T1 Studies of the phenomena of simultaneous contrast-color; and on a photometer for measuring the intensities of lights of different colors JF American Journal of Science JO Am J Sci FD American Journal of Science SP 1 OP 22 DO 10.2475/ajs.s3-46.271.1 VO s3-46 IS 271 A1 A. M. Mayer YR 1893 UL http://www.ajsonline.org/content/s3-46/271/1.abstract AB