P. Valentine Stansel's Device. Prior to 1657
(Exact date not known):
A, B, C is a large cistern of water, above which is another cistern D, E, which is supplied from the lower cistern by the pump X, operated by the water-wheel M, N, the crank L of which is attached by a rod K to the horizontal beam H, I, K, which swings at H, from the side of the upper cistern, as shown at F, G, H. The force-pump X, on the depression of the plunger O, causes the water to rise up the vertical pipe P, Q, R, S, and thence discharge itself into the cistern D, from which a small portion is allowed to escape through the short pipe T, V, whence it falls on the water-wheel, and so on continuously.