This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1827 Excerpt: ...LIGHT, an effeet, (not an element, or a prineiple) ereated in the air, whenever oxygen gas or any other antagonist gas is eoneentrated, fixed, and eombined with hydrogen and earbon, whieh have been highly rarefied or exeited by heat or motion. The first is ealled a supporter, and the latter a eombustible. The great ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1827 Excerpt: ...LIGHT, an effeet, (not an element, or a prineiple) ereated in the air, whenever oxygen gas or any other antagonist gas is eoneentrated, fixed, and eombined with hydrogen and earbon, whieh have been highly rarefied or exeited by heat or motion. The first is ealled a supporter, and the latter a eombustible. The great motion whieh by this eombination is eoneentrated at the spot, as at the wiek of aeandleis, of eourse, not lost there, but instantly re-diffused, and thia diffusion of atomie aetion, says Sir R. Phillips, is Light. The eoneentration of the volume of oxygen gas, eondensed at the spot by the hydrogen into aqueous vapour, and by the earbon into smoke, is the eause of the loeal heat; and the erossing of the aetion and re-aetion inward and outward, defines and eonstitutes the film of the flame. Chemists who eonsider light and heat as elements, eoneeive that eombustibles eontain light, and supporters ealorie, the eombination making the flame and the basis of both the resulting produets. The same writer eonsiders its passage through solid diaphanous bodies, and the rapid transmission of its effeet at the rate of 12 millions of miles in a minute, to be ineompatible with the travelling of identieal atoms, and therefore eoneeives that, as all spaee is full of gaseous atoms, they protrude or propel one another, and henee the effeet is diffused from atom to atom, eonsequently the effeet is almost as rapid as the protrusion of a solid rod. LIGHTHOUSE, a lofty building, ereeted on sea-eoasts to warn and guide ships by night. They are very eurious struetures, eonsisting of an intense body of light, radiated by eoneave refleetors and eonvex lenses, sometimes eoloured for distinetion's sake, and made to ehange and revolve as further means of distinetion. LIGHTNING...
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