the cocoa, this darkening being often taken, unfortunately, as indicative of increased strength. On this account the presence of added alkali should be regarded as an adulteration, unless notified on the package in which the cocoa is contained.
A more subtle treatment with alkali for the same purpose is the addition to the pulverized bean of carbonate of ammonia, or caustic ammonia. This is afterwards volatilized by the application of heat. Scents and flavourings are then added to disguise their smell and taste.
Besides these combinations of cocoa with starch, sugar, etc., and cocoa treated with alkali, there are now found on the market mixtures of cocoa with such substances as kola, malt, hops, etc., sold under strange-sounding names, reminding one of the many mixtures that are made up as medicines rather than food. While the substances thus incorporated are of value in their place, they possess no virtues which are absent from the pure cocoa, and cannot be in any way considered an improvement of cocoa
