Page:Journal of the Optical Society of America, volume 30, number 12.pdf/36

 Excitation purities for 70 Munsell notations: derived from the disk-mixture rule (psychophysical); computed from 1926 spectrophotometric data both for diffuse and 45° illumination (1926 data); and from the Glenn-Killian data on the papers of the Munsell Book of Color, with conformity to the Newhall psychological check indicated by direction of difference (psychological).

data appears somewhat better than with the psychophysical system. Before we can answer definitely, therefore, we shall need to study in further detail the preliminary report of the Newhall subcommittee (15), and may need also to wait for the final report which is expected to explore thoroughly the possibility of constructing a psychophysical