A Manual of Natural and Experimental Philosophy: Being the Substance of a Series of Lectures Delivered in the London, Russell, Surrey, and Metropolitan Institutions, Volume 2
A Manual of Natural and Experimental Philosophy: Being the Substance of a Series of Lectures Delivered in the London, Russell, Surrey, and Metropolitan Institutions, Volume 2
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1828 edition. Excerpt: ...less and less on the ball in_the tube; and on this account it happens, that air. condensed into a large machine only ten times, will project its ball with a velocity but little inferior to that given by gunpowder; if the valve of communication be suddenly shut again by a spring, after opening to let ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1828 edition. Excerpt: ...less and less on the ball in_the tube; and on this account it happens, that air. condensed into a large machine only ten times, will project its ball with a velocity but little inferior to that given by gunpowder; if the valve of communication be suddenly shut again by a spring, after opening to let out-air. It is requisite to have the condensing syringe of a small bore, perhaps not more than half an inch in diameter; otherwise the force requisite to produce the compression will become so great, that the operator cannot work the machine; for, as the pressure against every square inch is but '15lbs, and against every circular area of an inch in diameter, about lfilbs; if the syringe be an inch in diameter, it will require a force of as many times 12lbs., as the density of the air in the receiver exceeds that of the common atmosphere: so that, when the condensation is ten times, the force required will be 20lbs.; whereas, with a halfinch bore, it will only amount to 30lbs. " A very important' application of the condensing syringe has lately been suggested by Mr. Gordon. The object _of this ingenious philosopher is to employ condensed carburetted-hydrogen-gas for domestic purposes; and this he effects by compressing the gas in a cylindrical or globular vessel, similar to that shown in the accompanying engraving. 'PRESSURE AND EQUILIBRIUM O_F FLUIDS. Nature 0)" Fluidity.+Compressibilit_y of Water. Florentine Ea'pe1-iment.--Apparatus employed by Mr. Perkz'ns.%Tendency to Equilibrium.--Hydrostatic Pa 'Hg/drostatics is a very important science. In its more limited sense, it is confined to that part of the doctrine of. i fluids, which relates to their weight and pressure only: Hydrodynamics, on the contrary, ...
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