A System of Natural Philosophy, in Which the Principles of Mechanics ...
A System of Natural Philosophy, in Which the Principles of Mechanics ...
J L John Lee Comstock
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It consists of two such pumps, the pistons of which are moved by a lever with equal arms, the common fulcrum being at c, fig. 121. While the piston a is descending, the other piston, b, is ascending. The water is forced by the pressure of the atmosphere, through the common pipe p, and then dividing, as- cends into the working bar- rels of each piston, where the valves, on both sides, prevent its retmm. By the alternate depression of the pistons, it is then forced into the air box d, and then by... the direction pipe e, is thrown where it is wanted. This machine acts precise- ly like the forcing pump, only that its power is dou- bled, by having two pistons instead of one. 569. Fountain of Hiero. — There is a beautiful fountain, called the fountain of Hiero, which acts by the elasticity of the air, and on the same principle as that already describtd. Its construction will be understood by fig. 122, but its form may be varied according to the dictates of fancy or taste. The boxes a and b, together with the two tubes, are made air tight, and strong, in proportion to the height it is desired the fountain should play.
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