Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 354
ographic Art-Journal. 345 •will, I trust, receive, as promising beyondall others to enlighten us on those curiousphenomena which appear to link togetherthe organic and the inorganic worlds. THE PHOTOGRAPHOMETER. Mr. Claudet has devised the photograph-ometer and the dynactinometer for measur-ing the… … photographometer complete. The sensi-tive plate or paper is placed in a dark box,which is fixed in an independent frame, asshown, Figs. 46 and 47, and as placed inits position at f in the adjoining cut. Ablack silk webbing being fixed to themoveable plate seen at the head of the in- able plate are…
Photography · Art and photography
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