Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 56
It is not improbable that affinityfor mercury may be imparted by someelectrical influence of light. How couldwe otherwise explain that affinity for mer-cury given by some rays, and withdrawnby some others, long before light has actedas a chemical agent t Fig. 4. … Photography is certainly one of the mostimportant discoveries of our age. In rela-tion to physitJS and chemistry it has alreadybeen the means of elucidating many pointswhich had been imperfectly investigated,and of discovering others which had beenoverlooked in previous examinations. Wemay indeed…
Photography · Art and photography
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