Also 7 filteration. [a. Fr. filtration, f. filtrer to FILTER.]
1. The action or process of filtering.
1605. Timme, Quersit., II. iii. 115. Chymical workings, as Distillations, Calcinations, Reuerberations, Dissolutions, Filtrations, Coagulations, Decoctions, Fixations, and such other appertaining to this Science.
1758. The Elaboratory laid open, Introduction, 60. Filtration is generally practised, by means either of flannel cloth, or paper.
1822. Imison, Elements of Science and Art, II. 7. Filtration is a finer species of sifting.
1862. Stanley, Jew. Ch. (1877) I. v. 100. Vessels of wood and vessels of stone, then, as now, used for the filtration of the delicious water from the sediment of the river-bed.
fig. 1843. Prescott, Mexico, I. vi. (1864), 55. It is not easy to render his version into corresponding English rhyme, without the perfume of the original escaping in this double filtration.
2. A gradual movement like that of water passing through a filter; percolation.
1664. Power, Experimental Philosophy, I. 70. For Motion the Spirits move impetuously down the Nervous filaments,… but for Sensation they onely creep by a filtration down their Coats and Membranes.
1707. Curios. in Husb. & Gard., 69. If we pursue this Sap in its incomprehensible Filtration through the Pores of Plants.
1794. G. Adams, Nat. & Exp. Philos., II. xxi. 414. [The pervasiveness of light and heat] has been overlooked as an accidental filtration.
