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 103
Fig. 34. Fia;. 35. Fig. 34. Appearance of a radial slit 2° in width and 7 cm. in length, with its mid-point15 cm. from the centre of the disc, rotating at the rate of one revolution per 3 beforea glass illuminated by four acetylene-gas jets. (McDougall.) Fig. 35. Appearance with slightly increased…
Color vision
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