These useful preparations are now much used in making bread and pastry
of all kinds, and have the merit of being both cheap and wholesome.
They may be procured of all grocers and oilmen. The basis of all
baking powders consists of carbonate of soda and tartaric acid or
cream of tartar, and egg powders are made of the same materials, with
a little harmless colouring matter such as turmeric. By the action of
these substances, carbonic acid is generated in the dough, which
causes it to rise in the same manner as the so-called "aerated bread"
made on Dr. Dauglish's system, by which carbonic acid is forced into
the dough before baking.
[NEVER PUT OFF TILL TO-MORROW WHAT YOU CAN DO TO-DAY.]