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A Liquid That Shines In The Dark

Take a bit of phosphorus, about the size of a pea; break it into small
parts, which you are to put into a glass half full of very pure water,
and boil it in a small earthen vessel, over a very moderate fire. Have
in readiness a long narrow bottle, with a well-fitted glass stopper,
and immerse it, with its mouth open, into boiling water. On taking it
out, empty the water, and immediately pour in the mixture in a boiling
state; then put in the stopper, and cover it with mastich, to prevent
the entrance of the external air.

This water will shine in the dark for several months, even without
being touched; and, if it be shaken in dry warm weather, brilliant
flashes will be seen to rise through the middle of the water.

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