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The Philosophical Candle

Provide a bladder, into the orifice of which is inserted a metal tube,
some inches in length, that can be adapted to the neck of a bottle,
containing the same mixture as in the last experiment. Having suffered
the atmospheric air to be expelled from the bottle, by the elastic
vapour produced by the solution, apply the orifice of the bladder to
the mouth of the bottle, after carefully squeezing the common air out
of it, (which you must not fail to do, or the bladder will violently
explode.) The bladder will thus become filled with the inflammable
air, which, when forced out against the flame of a candle, by pressing
the sides of the bladder, will form a beautiful green flame.

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