ed in thjsmanner until we have resolved all the forces into two inclos-ing arcs of 90° each; and these finally resolved into one will befound to be exactly equal to the diameter. Again, we shallfind if we analyze theseforces by the same rule that the strainoh the shell of the boiler is the same on… … resents the amount of force exerted upon the arc of 90° whichit encloses, and the line B, the direction of the force and (beingof the same length) also its amount. This force, B, will be heldin equilibrium by the two forces represented by the lines C andD, each of which is equal to the radius. Now…
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