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The carbonic acid formed rises over the glowing coke, and takes up another atom of carbon to form the combustible gas carbonic oxide. This and the hot nitrogen passing over and through the coal above distill away its volatile constituents, and the whole mass of gas leaves by the exit pipe.
They might be safe, perhaps, for eight-and-forty hours. Fire would run only when the ground was absolutely dry, and when every twig or leaf was a combustible. But during those eight-and-forty hours there might be comparative ease at Gangoil. On the day following the night of the ride Mrs.
Not only must the aqueous part of those natural phlogistic bodies be evaporated, in order to their becoming coal, but the oily parts must also, by a still increased degree of heat, be evaporated, or separated by distillation from the combustible part.
The light combustible matter flashed up brightly, and the blaze ran along the ground a moment in the direction of the end of the reed; but at the instant when all expected to see the powder ignited, the flames seemed to die away, and the darkness which succeeded impressed them with the fear that the damp snow had, indeed, defeated their purpose.
You would have said there can be no lamp without oil or gas, or other combustible substance, to feed it; and yet you see a filament which sheds a light like that of noon all around it, and does not waste at all.
The remaining articles, and a few of the least valuable of their furs, were then thrown on the fire, and the wigwam being pulled down on the top of it, the whole mass of combustible material soon burst up into a flame, leaving in a short time no other trace of their abode on the spot than a pile of blackened cinders.
The water has not even any taste, and I can neither offer nor imagine any better explanation, than that it acquires this combustible property by passing over some aluminous land." Galinee's journal, 1669, in "Marshall Historical Writings," p. 209.
This was explained by the supposition that the more combustible a substance was the more phlogiston it contained, and since free phlogiston sought always to combine with some suitable substance, it was only necessary to mix the phlogisticating agents, such as charcoal, phosphorus, oils, fats, etc., with the ashes of the original substance, and heat the mixture, the phlogiston thus freed uniting at once with the ashes.
This, however, is not the only combustible employed by the inhabitants of Back Cup, for I see an enormous store of coal that must have been brought by the schooner and the tug. But it is the incineration of masses of dried seaweed that causes the smoke vomited forth by the crater of the mountain.
The Eskimos employ for this purpose pieces of quartz and iron pyrites. In the Sandwich Islands recourse is had to a process that necessitates much skill. There is arranged in a large dry leaf, rolled into the shape of a funnel, a certain number of flints along with some easily combustible twigs.
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