Identifier: practicaltreatis00accuuoft (find matches)
Title: A practical treatise on gas-light : exhibiting a summary description of the apparatus and machinery best calculated for illuminating streets, houses, and manufactories, with carburetted hydrogen, or coal-gas : with remarks on the utility, safety, and general nature of this new branch of civil economy
Year: 1815 (1810s)
Authors: Accum, Fredrick, 1769-1838
Subjects: Gas-lighting Candles
Publisher: London : Printed by G. Hayden ... for R. Ackermann ... Longman, Hurst, Rees, Orme, and Brown and Sherwood, Neely, and Jones ... and J. Hatchard ...
Contributing Library: Fisher - University of Toronto
Digitizing Sponsor: Ontario Council of University Libraries and Member Libraries

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lights are wanted. The extremitiesof the pipes have small apertures, out of whichthe gas issues, and the streams of gas beinglighted at those apertures burn with a clear andsteady flame as long as the supply of gas con-tinues. All the pipes which come from thegasometer are furnished at their extremitieswith stop-cocks to regulate the admission ofthe gas. The burners are formed in variousways, either a tube ending with a simple orifice,at which the gas issues in a stream, and if oncelighted will continue to burn with the moststeady and regular light imaginable, as long asthe gas is supplied ; or two concentric tubes ofbrass, or sheet-iron, are placed at a distance ofa small fraction of an inch from each other, andclosed at thebottom. The gas which enters be-tween these cylinders, when lighted, forms anArgand lamp, which is supplied by an internaland external current of air in the usual manner.Or the two concentric tubes are closed at thetop with a ring having small perforations, out of
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A TREATISE ON GAS-LIGHT. 79 which the gas alone can issue, thus formingsmall distinct streams of light. The gas-apparatus, plate 2, will be foundvery convenient for exhibiting, in the smallway, the general nature of this new art ofillumination, whilst at the same time it mayserve to ascertain, at a trifling expence, thecomparative value of different kinds of coals in-tended to be employed for the production ofthis species of light, as well as other occasionalpurposes connected with the gas-light systemof illumination. It consists of three distinct apparatus :*►—namely, a portable furnace, fig. 1, plate 2, bymeans of which the gas is prepared—fig. 2, apurifyer, or condenser, which separates andpurifies the products obtained from the coal, soas to render the gas fit for the purpose of illu-mination—fig. 3, a gasometer, or reservoir forreceiving and preserving the purified stock* ofgas, and from which it may be transferred anddistributed as occasion may require. The fol-lowing st

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