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2The horizontal face of the wheel or tympanum is close boarded, with apertures therein half a foot in size to admit the water. On the axis also channels are cut for each bay. This machine, when moored like a ship, is turned round by men walking in a wheel attached to it, and, by receiving the water in the apertures which are in front of the wheel, brings it up through the channels on the axle into a trough, whence it is conducted in abundance to water gardens, and dilute salt in pits.
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