If the precipitate settles readily, the supernatant liquor may be decanted through the filter paper, more water added to the precipitate and again decanted.
The decanted ley deposits on standing a 70% potassium chloride, which is purified by washing with cold water.
Every twenty-four hours or so the flow of juice may be conveniently stopped, and, after all the impurities have subsided, the superincumbent clear liquor may be decanted by a cock placed at the side of the cone for the purpose, and the vessel may be washed out.
The liquid is then allowed to stand for twelve hours, and the c.ear alcoholic solution is decanted from the precipitated hippuramide.
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