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Powders, Seidlitz

The cooling and refreshing drinks prepared with these powders are excellent both as refrigerant draughts and aperient medicines. Each drink requires two powders--an alkaline, generally put up in blue paper, and an acid, contained in a white one. The alkaline powder consists of two drachms of powdered Rochelle salts, and half a drachm of bicarbonate of soda, mixed together; and the acid paper of half a drachms of tartaric acid. The quantity of water employed is generally about a third of a pint. The contents of the blue paper should first be thoroughly dissolved in the water, then the contents of the white paper added, and the mixture drunk while effervescing.