Ferree, Clarence Errol, Rand, Gertrude, b.1886 · New York, etc. · leaf 47
revious paper.' They ments, neutral filters of the desired co- are shown in Figs. 6-11. efficient of transmission were inserted The decrease of illumination from in the aperture of the lamp house pro- 51 to 3 foot candles narrowed the lim- vided for the illumination of the its for red by amounts… … Fields for green. Fields for red. -Showing variations in both the extent and shape of the color fields when taken under 51, 17, 7, 3, Fig. and 0.03 foot-candles of light. and for green from 10 to 19 degrees, a oxid deposited from the burning metal result, it will be remembered, which was…
Ophthalmology · Vision · Color vision
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