in Chemistry, is nothing but the repetition of a distillation or sublimation several times, in order to render the substance purer, finer, and freer from aqueous and earthy parts.

in Geometry, is the method of finding a right line equal to a curve. The rectification of curves is a branch belonging to the higher geometry, in which the use of the inverse method of fluxions is of singular utility.

RECTIFICATION of Spirits. See DISTILLATION.