Edulcoration
The affusion of 3852. To Find the Dry Weight of a Pulp or Moist Precipitate. Pulps or precipitates, such as the metallic colors, chrome yellow, white lead, &c., are of different consistence at the top from what they are at or near the bottom of the vessel in which they water on any substance for the purpose of are contained; and the actual weight of the removing the portion soluble in that fluid. precipitate in the dry state can therefore not Edulcoration is usually performed by agitating be arrived at by merely taking a sample from or triturating the article with water, and re- top or bottom, but, in most cases, only guessed moving the latter after subsidence, by decan- at. When, however, the specific gravity of tation or filtration. It is the method com- such a precipitate in its dry state is known, as monly adopted to purify precipitates and other well as that of the surrounding liquid, the powders which are insoluble in water. operation of obtaining the accurate dry