Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 68
the velocity of the wind inmiles per hour. The ratio of thewind velocity to the center of thecup velocity is usually about 3 to I. 171^. ELECTROSTATICVOLTMETER FOR MEASUR-ING PRESSURES.—An electro-static voltmeter is shown herewith.In this form the meter is con-structed to measure pressures upto… … 172. STEVENS BOILER.—An early type of tubular boilers(1806), The principle is still in use- VWyyy-^-^^yyyy^-yy^y^-y^^yy^>^^yy,/yyy,.y^yyy^yyyyyyy^
Mechanical movements
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