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The Collaborative International Dictionary
inquartation

Quartation \Quar*ta"tion\, n. [L. quartus the fourth: cf. F. quartation. So called because usually enough silver is added to make the amount of gold in the alloyed button about one fourth.] (Chem. & Assaying) The act, process, or result (in the process of parting) of alloying a button of nearly pure gold with enough silver to reduce the fineness so as to allow acids to attack and remove all metals except the gold; -- called also inquartation. Compare Parting.

Wiktionary
inquartation

n. (context chemistry archaic English) quartation

Usage examples of "inquartation".

It has the further advantage, that, if the quantity of silver necessary for inquartation is known, the right quantity may be added here, so as to save a subsequent operation.

In fact, in routine assays, where the quantity as well as the quality of the gold is known within fair limits, it is often the custom to add the silver for inquartation to the lead during the first cupellation.