A descriptive and historical account of hydraulic and other machines for raising water, ancient and modern : with observations on various subjects connected with the mechanic arts: including the progressive development of the steam engine . s. A, A, represent two of tlie latter ; the upper part of one is tapered tofit it into the lower end of the pump log as is yet sometimes done. D, B, anupper box, of a-klnd occasionally used at the present time. The valve or clack is a disk laid loosely overthe apertures, and is kept in itsplace by the rod, which passesthrough its centre and admits itto rise
A descriptive and historical account of hydraulic and other machines for raising water, ancient and modern : with observations on various subjects connected with the mechanic arts: including the progressive development of the steam engine . s. A, A, represent two of tlie latter ; the upper part of one is tapered tofit it into the lower end of the pump log as is yet sometimes done. D, B, anupper box, of a-klnd occasionally used at the present time. The valve or clack is a disk laid loosely overthe apertures, and is kept in itsplace by the rod, which passesthrough its centre and admits itto rise and fall. C, the conicalsucker referred to, p. 214. The annexed figure of adouble pump is from Fluddsworks. It appears to havebeen sketched by him while i-nGermany, from one in actualuse. It is represented asworked by a water wheel,that, by means of cog wheelstransmitted motion to the hori-zontal shaft; the cams on whichalternatclv depressed one endof the levers to which the pumprods were attaclied, and thusraised the latter. They de-scended by their own weight,as will appear from an inspec-tion of the figure. The separate view of a rod is ii;tended to sliow theanplication of cranks on the horizontal shaft, in place of cams and le-. No. 89. Double Pump in Germaa mines. A. D. 1613. 220 T £ Pump confined chkfiy to civilized States. [Book II vers. The lower ends of the pumps are inserted in baskets \^hich act asstrainers. A double series of pumps, (ona over tlie other) as employedin a mine at Markirch in Germany, is also figured by Fludd. It is inte-resting on account of the mode of communicating motion to the rods. Acrank on the axle of a water wheel imparts motion to a walking beam, asin a steam engine; (in the latter the operation is itversed) and the pumj)rods are attached to both ends of the beam.* The idea may probably occur to the general reader, that the mechanical talent and enterprise of the preceding and present century, whichhave produced so many original machines an
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Keywords: ., bookcentury1800, bookdecade1870, bookiddescriptiveh, bookyear1876
