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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t flame, when produced in great quan-tity, and made to burn violently, by mixingWith a proper portion of fresh air, driving iton the subject, and throwing it into whirlsand eddies, thereby mixing the air with everypart of the hot vapour, produces a very in-tense heat. The great power of a gas-flame does notappear when we try small quantities of it, and point of the flame under the bottom of the tinned vessel,and suffer it to burn there, by squeezing the bladder till thewhole of the gas is consumed. The increase of temperatureof the water in the tinned vessel being carefully noticed be-fore and after the experiment, gives very accurately thebeating power of the given bulk of the inflammable gas.It was thus proved thaf— Olefiant gas raises an equal volume of water. 14° Carburetted h idrogen, or coal-gas 10 Carbonic oxid 4 Hidrogen „ 5 Spermaceti oil 10 grains burnt in a lamp raised 30,000 grains of water , 5 Tallow 5 Wax 5,75 Oil of turp^ntiue 2 Spirit of wlue .... »...«, 2 — n
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A TREATISE ON GAS-LIGHT. 115 allow it to burn quietly, because the air is notintimately brought into contact with it, butacts only on the outside ; and the quantity ofburning matter in the surface of a small nameis too minute to produce much effect. But when the flame is produced in largequantity and is freely brought forward into con-tact and agitated with air, its power to heatbodies is immensely increased. It is thereforepeculiarly proper for heating large quantities ofmatter to a violent degree, especially if thecontact of solid fuel with such matter is incon-venient. As the gas-flame may be made to assumeany shape and intensity, and as there is nothingto spill, it maybe exhibited under such varietyof forms and designs, as cannot fail to give riseto the most tasteful ornamental illumination. Plates III. IV. and V. exhibit such designsof different kinds of gas-lamps, chandeliers,lustres, candelabras, &c. as are already in usein this Metropolis. Plate III. fig. i, represents a R

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