Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 76
y periods. and geared together that,excluded from the lens, is 2,730 HAWKINS ELECTRICITY A long tube V extends through the center of the camera, and is providedwith a detachable cap at S. This tube forms the sight hole for inspectingthe image on the film, prior to exposure. The gate G is a kind of… … SHUTTER5ET SCREW ADJUSTABLESHUTTER REAR hUT5 V Fig. 3,892.—How to use the Schneider camera. Open the doors on both sides of the camera byopening locks, fill retort B in dark room with perforated, sensitive negative film A of reliablemanufacture, close cover and secure retort B, with nut, screw V…
Electrical engineering
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