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 . )e useful, but for the reasons above stated, theyhave never V)een extensively employed In the arts. A simple form of oneis described In a late volume of the London Mechanics Magazine, andalso in the 22d vol. of the Journal of the Franklin Institute, p. 327. See. No. lJj. Mercurial Iuinp. 276 , HydrostatK Prr.:. [Uook III also vf)]. xxxil, Plill. Transaction
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 . )e useful, but for the reasons above stated, theyhave never V)een extensively employed In the arts. A simple form of oneis described In a late volume of the London Mechanics Magazine, andalso in the 22d vol. of the Journal of the Franklin Institute, p. 327. See. No. lJj. Mercurial Iuinp. 276 , HydrostatK Prr.:. [Uook III also vf)]. xxxil, Plill. Transactions, and Abridg. vol. vi, 3t)2. DesRguliersPhil. vol. ii, 491. In Jamiesons Dictionary, p. 852, a mercurial pump inthe form of a wheel is descrilied. The hydrostatic press is simply a cylindrical forcing pump, whose pistonIS moved by the water, instead of the latter Vjy it. A platen, on which areplaced the articles to be pressed, is connected to the upper end of the pistonrod ; water is then ijijected into the cylinder by a much smaller pump,and as this liipiid is, to all practical purpostis, incDmprvssihle, the piston isnecessarily raised, and the articles brought against an immoveable plate,between which and the platen they are compressed. The degree of pres-sure thus excited depends upon the difference between the area of thepistons of the pump and of the press. The apparatus exhibits in anotherform, the celebrated hydrostatic paradox by which the pressure oi a li(]uidcolumn however small,
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Keywords: ., bookcentury1800, bookdecade1870, bookiddescriptiveh, bookyear1876
