. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. hese two-fold crossing currents of air,even through the substance of stone-ware tubes. True economy of heat, and salubrity,alike require vivid combustion of the fuel, with a somewhat brisk draught inside of thechimney, and a corresponding abstraction of air from the apartment. Wholesomecontinuous ventilation, under the ordinary circumstances of dwelling houses, cannotbe secured in any other way. Were these mephitic stoves, which have been of lateso ridiculously puffed in the public


. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. hese two-fold crossing currents of air,even through the substance of stone-ware tubes. True economy of heat, and salubrity,alike require vivid combustion of the fuel, with a somewhat brisk draught inside of thechimney, and a corresponding abstraction of air from the apartment. Wholesomecontinuous ventilation, under the ordinary circumstances of dwelling houses, cannotbe secured in any other way. Were these mephitic stoves, which have been of lateso ridiculously puffed in the public prints, generally introduced, the faculty would CHIMNEY. 287 need to be immediately quadrupled to supply the demand for medical advice • for headevervinSS ^^T^^ apoplexy, would become the constat?inmates ofSlfl/rP^fif t T- The phenomena of the grotto of Pausilippo might^Kn Sedaily realized a home among those who ventured to recline upon sofas in such carbonated apartments; only instead of a puppy being suffocated pro te^^ore/humn £°swould be sacrificed, to save two-penny worth of fuel per diem = 282 285. 288 CHLORATE OF POTASH. The figures upon the preceding page represent one of the two chimneys recently erect-ed at the Camden Town station, for the steam boilers of the two engines of 60 horse-power each, belonging to the- London and Birmingham Railway Company. These en-gines draw their train of carriages up the inclined plane of Hampstead Hill. The chim-neys were designed by Robert Stephenson, Esq., engineer to the Company, executed byWilliam Cubitt, Esq., of Grays Inn Road,—and do equal honor to both gentlemen,being probably the most elegant and substantial specimens of this style of architecture inthe Avorld. In the section, yig. 281, A represents a bed of co7icrete, 6 feet thick, and 24 feet square. B, brick footings set in cement; the lower course 19 feet square. c, Bramley-fall stone base, with a chain of wrought iron let into it. D, a portion, 15 feet high, curved


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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology