Arcanum corallinum

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Arcanum corallinum, in alchemy, is a preparation of red precipitate, made by distilling it with spirit of nitre, and repeating the distillation again and again, till a red powder is produced. This powder is then boiled in water, and the water poured off, and tartarized spirit of wine put to the powder. Two or three redistillations are made, creating a powder that was used for treating gout, dropsy, scurvy, etc. It operates chiefly by stool.