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Tartar, t�r′tar, n. a mixture of bitartrate of potash and tartrate of lime, being a deposit formed from wine, and known in its crude form as argol: a concretion which sometimes forms on the teeth.—adjs.

After these juices have been secreted, the ores themselves are melted, with argol added to them.

Or else take one portion of ore, one portion of lead granules, half a portion of salt, one-fourth of a portion of argol, and the same quantity of lees of the aqua which separates gold from silver.

Or else one libra of the concentrates from washing pyrites, or other stones to which gold adheres, is mixed with half a libra of salt, half a libra of argol, a third of a libra of glass-galls, a sixth of a libra of gold or silver slags, and a sicilicus of copper.

If the alloy of argentiferous gold and lead, or the silver-lead alloy, contains impurities from the ore, then he throws in either equal portions of argol and Venetian glass or of sal-ammoniac, or of Venetian glass and of Venetian soap; or else unequal portions, that is, two of argol and one of iron rust; there are some who mix a little saltpetre with each compound.