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Bicarbonate of Potassa

Dissolve 48 ounces carbonate of potassa in 10 pints distilled water; pass carbonic acid gas through the solution to saturation (the gas may be evolved from chalk by diluted oil of vitriol). Filter, and evaporate, that crystals may form, at a heat not exceeding 100° Fahr.; decant the clear, and dry the crystals. (U.

S. Ph.) solution and crystallization, it may be obtained in larger and more regular crystals. (Cooley.)

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