This section is from the "Elixirs And Flavoring Extracts. Their History, Formulae, & Methods of Preparation" book, by John Uri Lloyd. Also available from Amazon: Elixirs and flavoring extracts,: Their history, formulae, and methods of preparation;
Elixir of calisaya, 15 fluidounces.
Solution of citrate of ammonium, 1/2 fluidounces.
Tincture of chloride of iron, 1/2 fluidounces.
Mix the solution of citrate of ammonium with the tincture of chloride of iron, and add the elixir of calisaya.
Each fluidrachm (teaspoonful) of the finished elixir contains about two minims of tincture of chloride of iron, and represents nearly four grains of calisaya. The addition of the solution of citrate of ammonium prevents discoloration of mixtures of this elixir, and substances containing vegetable tannates. To the fact that this mixture could accomplish the aforenamed result we are indebted to Mr. J. Creuse, who has written several interesting articles on the subject, and we refer the reader to the back numbers of the Druggists' Circular and Journal of Pharmacy, if particularly interested in the subject.