the introduction of paper as support for the insure the successful worliing of the improved film. sensitive film and to the manufacture of improved and We have described but a fewof the devices that have new apparatus especially designed for operating the been devised. The simplicity of the film,… … The curved metal end pieces at the bottom are at- Fig. l.-EASTMAN CAMERA WITH BOLL HOLDEB tached by a short link. When used for focusing, this ATTACHED. link is pushed inward, which allows the ground glass to Fig. 8.-INTEBI0B AKD SLIDE FBONT OF THE BOLL shut up tightly against the frame, as shown…
Patents · Railroad · Machine · Patented · Scientific American · Phonograph · Perspective view · Hot water · Electric light · Ground glass · American railroad · Sturtevant mill · Sewing machine · War ship · Floor plans
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