The self-raising flour, so widely advertised by grocers, is flour in
which these ingredients or their equivalent have been mixed by the
manufacturer.
212. Soda Mints. Bicarbonate of soda is practically the sole
ingredient of the soda mints popularly sold for indigestion. These
correct a tendency to sour stomach because they counteract the surplus
acid in the stomach, and form with it a safe neutral substance.
Seidlitz powder is a simple remedy consisting of two powders, one
containing bicarbonate of soda, and the other, some acid such as cream
of tartar. When these substances are dissolved in water and mixed,
effervescence occurs, carbon dioxide escapes, and a solution of
Rochelle salt remains.
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