Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 229
se with convex lenses. An ordinarybright light from a lamp, with two hose con-nections, sling and guide lanyards. Onehose is to supply fresh air, while the othercarries off the gas of combustion. VanderWeyde model. A powerful electric arclight is a later model. 844. ROAD BUILD-ERS LEVEL. —A… … 845, Section through reflector and level. NAVIGATION AND ROADS. 2 19
Mechanical movements
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