Defecation
In chemistry, the separation of a liquid from its lees, dregs, or impurities. This is usually performed by blow-pipe flame is necessary. The tube should be heated to a dull red about an inch either way beyond the point of curvature, by revolving it in the flame; as soon as the glass begins to yield, bend the tube very gradually until curved as desired. Stopping one end of the tube, and blowing into the other while bending it, will prevent wrinkling or collapsing at the point of curvature. It requires subsidence and decantation, and is commonly some tact to bend a tube with an even curve applied to the purification of saline solutions, and without collapsing its sides; and it is on the large scale, in preference to filtration, recommended by an experienced chemist to than which it is both more expeditious and use a Bunsen burner, having the extremity inexpensive. flattened out so as to give a short and thin,