Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in constructive and operative machinery and the mechanical arts, being practically a mechanical dictionary, commencing with a rudimentary description of the early known mechanical powers and detailing the various motions, appliances and inventions used in the mechanical arts to the present time, including a chapter on straight line movements, by Gardner D. Hiscox (1914)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 198
AIR POWER APPLIANCES. 187 … 696. VENTILATOR OR COWLFOR A CHIMNEY TOP.—The cor-rugated edges of the outside guardring: in tensifv the draft bv directno: the 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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