Science Progress in the Twentieth Century, Vol. 2: A Quarterly Journal of Scientific Work and Thought; January, 1908 (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Science Progress in the Twentieth Century, Vol. 2: A Quarterly Journal of Scientific Work and Thought; January, 1908

Herschel had repeated Seebeck's experiment; Daguerre and Fox Talbot had both Observed that in some Of their photographs a red Object produced a red colour in the picture; and Robert Hunt had succeeded in Obtaining colours on paper impregnated with various silver salts. Hunt put, for example, a prepared sheet under red, yellow, green, and blue glasses, and exposed the arrangement for a week to diffused light. The silver chloride became red under the red glass, dirty yellow under the yellow glass, a dark green under the green, and a light Olive under the blue. But with a sheet differently prepared he tells us he Obtained a very beautiful picture, in which the sky was crimson, stucco-fronted houses came out slaty blue, and the green fields Of a brick-red tint.

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