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"The Hydraulic Ram is a machine for raising water, and depending for its action on the impulse of flowing water. The water falling from a reservoir passes into a pipe or chamber <em>(b)</em>, at the end of which there is a ball valve <em>(c)</em>. The rush of supply water at first closes this, and the water finding no exit there acquires pressure enough to open another valve <em>(d)</em> and pass into an air-vessel placed over it <em>(f)</em>. The cessation of pressure at valve <em>c</em> allows it to fall again; an outrush of water takes place there, relieving valve <em>d</em>, which again closes. The pressure of the flowing water upon valve <em>c</em> once more closes this valve, and valve <em>d</em> again opens, and an additional quantity of water is forced into the air-vessel; and so on by a series of pulsations which send the water along the service pipe, and, in properly arranged machines, raise it to a very considerable height, although the impulse is dervied only from the fall of a few feet."&mdash;(Charles Leonard-Stuart, 1911)

Hydraulic Ram

"The Hydraulic Ram is a machine for raising water, and depending for its action on the impulse of flowing…