Haswell's engineers' and mechanics' pocket-book .. (1844)
Haswell, Chas. H. (Charles Haynes), 1809-1907 · New York, Harper & brothers · leaf 190
25 ]12.50018.00032.00050.000 Description. Barely observable.Just perceptible.Light breeze. Gentle, pleasant wind. Brisk blow.Very brisk.High wind. Very high. Storm. Great storm. Hurricane. Tornado, tearing up trees, &c. To find the Force of Wind acting perpendicularly upon aSurface.… … 1j I^ ^ . Let AB C D be the vertical section of a wall, behind which is abank of earth, AD/.; let DG be the line of rupture, or naturalslope which the earth would assume but for the resistance of thewall. . - In sandy or loose earth, the angle G D H is generally 30«; in firmerearth it is 36°, and…
Engineering · Mechanical engineering
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