Scientific American 16, 8.1.1848
Take of the nitrate of potass (salpetre 8) parts sublimed sulphur 4 parts and antimony 1 part, and let them all be mixed powder and beat firmly into a stout iron cup and set on fire and it will give an intense luminous light and if a little camphor is added it is still more brilliant. Such lights have been made use of for signals at sea, by communicating to a great distance at night.
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