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A Water Which Gives Silver A Gold Colour

Take sulphur and nitre, of each an equal quantity; grind them together

very fine, and put them into an unglazed vessel; cover and lute it

well; then set it over a slow fire for 24 hours; put what remains into

a strong crucible, and let it dissolve; put it into a phial, and

whatever silver you anoint with it will have a gold colour.