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Lixiviation

The process of disolving out or extracting the saline matter of bodies, more especially of ashes, &c., by means of ablution or digestion in water. The solution so obtained is called a lye or lixivium, and the salts resulting from the evaporation of such solutions, lixivial salts.

The rapidity of filtration depends upon the porosity of the filtering medium the extent of filtering surface-the relative viscidity or limpidness of the filtering liquid, and the porosity and fineness of the sub- Fig. 6.