An introduction to the study of colour vision (1915)
Parsons, John Herbert, Sir, 1868-1957 · Cambridge [Eng.] : University Press; New York, G.P. Putnam's Sons · leaf 93
pigments do not give the same fields as the spectrum colours with which they approximately match, since they are impure colours (Abney1). Fig. 31 gives the data for the fields for the whole range of the spectrum with three different intensities, the luminosities of the D line being 3'95, 0'99, and… … 54 56 38 46 50 86 34 10 14 Fig. 31. The temporal and nasal limits of the fields of vision for spectral colours at three different intensities of illumination. (Abney.) It will be seen that when the temporal field reads 40° the nasal reads 30°, and that as the field increases 7J° on the temporal…
Color vision
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