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Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 194

An illustration from Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary, 1917, leaf 194
AIR POWER APPI^IANCES. 187 … 696. VENTILATOR OR COWLFOR A CHIMNEY TOP.—The cor-rugated edges of the outside guardring intensify the draft by directngthe wind in a vertical direction. 697. A WIND GAUGE for obtain-ing the force of the wind in inchesheight of water, from which the windpressure per square foot may be ob-tained…

Mechanical movements

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