Mechanics' magazine and register of inventions and improvements . common kind that undergo thegreatest clianges in these respects,) are ex-panded six cubic inches in every one hundredcubic inches, on an exposure to an increase of90° of heat, and consequently sustain an equaldiminution of bulk inider an equal diminutionof temperature. If we employ a gallon ofeither of tliose fluids, it will, under the operationof the above laws of nature, undergo an ave-rage daily expansion and contraction of inches, which, if made to act upon a pis-ton in a cylinder of one inch in diameter, wouldelev
Mechanics' magazine and register of inventions and improvements . common kind that undergo thegreatest clianges in these respects,) are ex-panded six cubic inches in every one hundredcubic inches, on an exposure to an increase of90° of heat, and consequently sustain an equaldiminution of bulk inider an equal diminutionof temperature. If we employ a gallon ofeither of tliose fluids, it will, under the operationof the above laws of nature, undergo an ave-rage daily expansion and contraction of inches, which, if made to act upon a pis-ton in a cylinder of one inch in diameter, wouldelevate, and the pressure of the atmospherewould depress it, about three and a half inchesdaily. This is the power. It is necessarily of aniiregular and intermitting kind, having, withthe exception of the niunerous daily fluctua-tions (which would each operate as a movingpower) an interval of twenty-four hours be-tween each exacerbation of action ; but to con-vert it into an uniform and continuous motion,there are nutnerous means obvious to everypractical mechanic. i 2 3 4 5 6 7 8 9 10 11 13 References.—A A A, a vessel consisting of2 connnon receivers and tubes, (48,) enoughto hold a gallon of an expansible fluid. B, acylinder with a piston, on which the expansionof the fluid in A, produced by change of at- mospheric temperature, is to act. C, a pump,The grand object being with a valve opening inwards, (not seen in theobtained of moving a piston spontaneously in figure.) D, a tube, up which mercury is to bea cylinder, it will be no dalcult matter to ap- forced by the pump C, into the cistern E. F, a ply that power by a working beam, spring, orvarious other ways, tu any mechanical the machine which I constructed, ofwhich the attached figure is a roughly drav/nelevation, I have applied thr instoii to a beam,the farther end of which works a pump large enough to receive thirty j>ounds of quicksilver, j JqThis quantity of mercury is elevated througha tube by the action
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Keywords: ., bookcentury1800, booksubjectindustrialart, booksubjecttechnology
