The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 121
kes with thevertical. Now when the earth islevel with the top, the pressure ofearth may always be found by ic-garding it as a fluid, having theweight a cubic foot, equal to theweight of a cubic foot of the earth,multiplied by the square of the tangent of half the angleof the natural slope from the… … PRACTICAL MECHANICS. 117 of the material, gives the weight, in this case, of a cubicfoot of the equivalent fluid pressing against the wall. Ques. 23. A revetment wall 40 feet high, and 10 feetthick, sustains the pressure of earth of mean quality, hav-ing the weight of a cubic foot equal to 100 lbs.…
Mechanics, Applied
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