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Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices"; (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing company · leaf 176

An illustration from Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices";, 1917, leaf 176
413. SEARCH-LIGHT … MIRROR. Silvered back. The lensmirror is accurately ground and polishedto the exact curvature required to givea perfectly parallel beam, and with ahalf-foot acetylene flame it will showup the whole road for over 1,500 feet ;the same size flame with the best metalreflector will show only a hundred…

Mechanical movements

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