A descriptive and historical account of hydraulic and other machines for raising water (1842)
Ewbank, Thomas · Tilt & Bogue · leaf 115
Ancient Egyptian Swape . 95 Chap . 13 . ] double swapes , i . e . two on each frame , the bücket of one descending as the other rises . They were relieved every hour , so that fifty - four men were required to keep the machines constantly m motion . _ The overseer or task - master measured the time… … No . 35 . Modern Egyptians using the Swape . It is impossible to pass up the Nile in certain States of the piver , without being surprised at the myriads of these levers , and at their unceasing move - ments ; for by relays of men , they are often worked without intermission , both night and day .…
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