Maria Parloa,
Miss Parloa's New Cook Book
“ Cream of tartar is expensive, soda cheap. If one prefers to use baking powders there will be no need of cream of tartar, but the soda will still be required for gingerbread and brown bread, and to use with sour milk, etc. The advantage of baking powder is that it is prepared by chemists who know just the proportion of soda to use with the acid (which should be cream of tartar) , and the result will be invariable if the cook is exact in measuring the other ingredients. When an inexperienced cook uses the soda and cream of tartar there is apt to be a little too much of one or the other. ”
