Page:Journal of the Optical Society of America, volume 30, number 12.pdf/38

 mentation Institute, 2101 Constitution Ave., Washington, D. C.

11. E. Tyler and A. C. Hardy, “,” J. Opt. Soc. Am. 30, 587 (1940).

12. T. Troland, The Principles of Psychophysiology, Vol. II. Sensation (D. Van Nostrand Co., Inc. New York, 1930).

13. K. S. Gibson, “Approximate spectral energy distribution of skylight,” J. Opt. Soc. Am. '30, 88A (1940); Dorothy Nickerson, “The illuminant in color matching and discrimination,” Illuminating Eng., to be published.

14. Munsell Book of Color (Munsell Color Co., Baltimore, 1939).

15. S. M. Newhall, “Preliminary report of the Optical Society of America Subcommittee on the spacing of the Munsell colors,” J. Opt. Soc. Am. 30, 617 (1940).

16. J. J. Glenn and J. T. Killian, “Trichromatic analysis of the Munsell Book of Color,” J. Opt. Soc. Am. 30, 609 (1940).

17. A. H. Munsell, “On a scale of color-values and a new photometer,” Technology Quarterly 18, 60 (1905).

18. D. B. Judd, “The 1931 I.C.I. standard observer and coordinate system for colorimetry,” J. Opt. Soc. Am. 23, 367 (1933).

19. W. de W. Abney, “On the change of hue of spectrum colors by dilution with white light,”’ Proc. Roy. Soc. London A83, 120 (1910); G. Révész, “Ueber die vom Weiss ausgehende Schwachung der Wirksamkeit farbiger Lichtreize (mit Anschluss einer Mitteilung des Herrn Prof. Dr. G. E. Miiller), Zeits. f. Sinnesphysiol. 41, 116 (1906).