Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 270
s appears to tend to the perfection ofthe effect. It is essential that the silverbe very pure. The thickness of the coppershould be sufficient to maiutain perfect flat-ness, and a smooth surface ; so that theimages may not be distorted by any warp-ing or uneveDness. Unnecessary thick-ness is to be… … * Con tinned from page 222, VoL 4, No. 4.VOL. -1, NO. 5, 1 the picture. The second is the formationof the sensitive ioduret of silver over theface of the tablet. The third is the adjust-ing of the plate in the camera-obscura, forthe purpose of receiving the impression.The fourth is ibe bringing out…
Photography · Art and photography
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