Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 57
stian Era. When water is to be raised higher than by the tympanum,a wheel is made round on axis of such a magnitude as the height to whichthe water is to be raised requires. Around the extremity of the side ofthe wheel, square buckets cemented with pitch and wax are fixed; so thatwhen the wheel is… … Fig. 77. formed of woven bamboo.The sizes of these wheels,vary from twenty to seventyfeet in diameter; some raiseover three hundred tons ofwater in twenty-four hours.A writer mentions otherswhich raise a hundred andfifty tons to the height offorty feet during the sametime. The Persian Wheel.…
Hydraulic machinery · Pumping machinery
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