Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 18
aphic paper on, whenwe desire to copy any object; d, a door toshut off the light from the paper or plateuntil the moment we desire to expose it toluminous agency. Figure 19 representsthis screen or door more perfectly, in theact of falling; e, is a door at the back,through which the picture formed… … 19. tially expensive. Its conveniences are thoseof folding, and thus packing into a verysmall compass, for the convenience of tra-velers. With the camera-obscura properly ar-ranged, and the copying frame, the photo-graphic student who confines his attentionto the processes on paper has nearly all…
Photography · Art and photography
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
