Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 63
an. One or more hori-zontal bars were attached toit, of a length adapted to theFig. 81. power employed, whether of men or animals; and an alternating rotary movement impartedto it, as in the common wheel or capstan, represented in thefigui-e. It appears that machines of this kind, and worked byynen… … Historical Introduction. 65 SUCCESSIVE INVENTIONS. With the wide acceptance in practical use of the Duplexsteam pump, may be dated the beginninjij of the modem inven-tive period of pumping machinery; this introduction of theDujilex pump was only one of five successive advanceswhich it were well for…
Hydraulic machinery · Pumping machinery
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