Dissolve camphor in rectified aqua vitae and evaporate them in a very close chamber where no air can get in. He that first enters the chamber with a lighted candle will be much astonished, for the chamber will seem to be full of fire, very subtle, but it will be of little continuance. You must note that it is the combustible vapor, with which the chamber is filled, that takes the flame from the candle.
Diverse such like experiments as this may be done by putting such a combustible vapor into a box, or cupboard, or such like which will as soon as anyone shall open them, having a candle in his hand, take fire and burn.
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