Читать книгу Description of the Process of Manufacturing Coal Gas. For the Lighting of Streets Houses, and Public Buildings онлайн

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The following table exhibits the maximum quantity of gas obtainable from this class of coals.

One Chaldron of Coal, produces Cubic feet of Gas. Welch coal. First variety, from Tramsaren, near Kidwelly,ssss1 2,116 Second variety, from the yard vein at the same place 1,656 Third variety, from Blenew, near Llandillo 1,416 Fourth variety, from Rhos, near Ponty Barren 1,272 Fifth variety, from the Vale of Gwendrath 1,292 Sixth variety, from ditto 1,486

ssss1 The coal for these Experiments was supplied gratuitously, to the Gas Works of the Royal Mint, by Sir W. Paxton of Middleton Hall.

When we consider the before mentioned varieties of coal in an economical point of view, as fuel to be used in the gas-light process, for heating the retorts, it appears from a series of experiments that have been made under my direction, that the second class of coal comprehending those varieties which contain a larger quantity of carbon than bitumen (ssss1,) afford the most economical fuel, they act less on the grate bars, and fire bricks of the furnace than those varieties which take fire easily and burn briskly with a strong blaze. A mixture of Welch Stone coal, and Newcastle coal forms an excellent economical fuel, where an intense glowing fire is required.