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The fabled ½universal solvent¸ of the alchemists; a menstruum capable of dissolving all bodies.

The earthy salts may be diffused throughout a uniformly cheesy basis, or they may be deposited in a partially softened, cheesy menstruum, when a mortar-like material results.

‘Now, lux is called the seed, or menstruum, of the red dragon; or, in other words, that gross and corporeal light, which, when properly digested and modified, produces gold.’

Repercolation, rē-pėr-ko-lā′shun, n. in pharmacy, the successive application of the same menstruum to fresh parts of the substance to be percolated.

Note.—Many experiments have been made, in order to discover some aqueous size, that when dry, would resist moisture: and some have recommended skimmed milk, and others vinegar as a menstruum for the glue.