International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 438
quare inches,and the atmospheric pressure upon it is.314.16 X 14.7 = 4,618 pounds, nearly. Inorder to shove the piston upwards 9 inches,the pressure upon it must be twice as great,or 9,236 pounds, and to this must be addedthe weight of the piston and rod, or9,236 + 100 = 9,336 pounds. The… … Fig. 19(J.point of being above it will then be twice as great as before, and the pres-sure one-half as great, or 4,618 -^ 2 = 2,309 pounds. Thetotal upward pressure will be the pressure of the atmosphereless the weight of the piston and rod, or 4,618 — 100 = 4,518pounds, and the force necessary to…
Railroad engineering
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