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 . r mine near Belleville, New in fact imparted a new and very beneficial impulse to mining opera-tions, and quickly raised the value of mining stock. Deluged works wererecovered, old mines deepened, and new ones opened, in various districts,both in Great Britain and continental Europe : nor were thev confined todraining mines, but were employed to
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 . r mine near Belleville, New in fact imparted a new and very beneficial impulse to mining opera-tions, and quickly raised the value of mining stock. Deluged works wererecovered, old mines deepened, and new ones opened, in various districts,both in Great Britain and continental Europe : nor were thev confined todraining mines, but were employed to raise water for the use of townsand cities, and even to supply water-wheels of mills. By exciting theattention of Ingenious men to their improvement, they became the extending manufactures genei-ally, and introduced one which had neverV>efore been known in the world, viz. the fabrication of motive engines—amanufacture upon which the wealth, power and happiness of nations arndestined in a great degree hereafter to depend. 9.] Leopolds Engine. 46( Leopold, .o wnorii we have fretiuenlly referred, rcnectliig on Paoinsexnerlments, sugge? eJ llie following application of steam to move pistonsanc Mise -*:.ie. ;—. No. 197. Leopolds Hijh Pressure Eogino A. D. 1720. Two Steam cylinders, open at top and prrvided with pistons a h, wereplaced over the boiler c, from the upper part of which a four-way cock dadmitted steam alternately into the bottom of each. The pistons wereconnected by inflexible rods to the ends of two w^orking beams, and to theopposite extremities of the beams were connected, by similar rods, thepistonsy ^ of two forcing pumps, whose lower parts were placed in thewater to be raised. An attendant turned the plug of the cock to admitsteam under one piston, which was pushed up by ihe expansive force ofthe fluid, and consequently the piston of the pump connected to the samebeam was forced down, and .the water in its chamber driven up the risingmain
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Keywords: ., bookcentury1800, bookdecade1870, bookiddescriptiveh, bookyear1876
