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;
Hydrochlorate of quinine, 64 grains.
Solution of arsenious acid (U. S. P., 1883), 128 minims.
Simple elixir, 15 fluidounces.
Tincture of chloride of iron, 1 fluidounce.
Hydrochloric acid, a sufficient quantity.
Triturate the hydrochlorate of quinine in a mortar with four fluidounces of simple elixir, and add of hydrochloric acid an amount sufficient to effect its solution; then add the remainder of the simple elixir and the other ingredients. Filter if necessary. If hydrochlorate of quinine cannot be obtained, use quinine alkaloid instead, and hydrochloric acid enough to dissolve it.
Each fluidrachm (teaspoonful) of the finished elixir contains about three and one-half minims of tincture of chloride of iron, one-half grain of hydrochlorate of quinine, and one minim of officinal solution of arsenic.
Our formula introduces the hydrochlorate of quinine, chloride of iron, and solution of arsenious acid in hydrochloric acid. Too great caution cannot be employed to prevent the precipitation of arsenic, and by using hydrochloric acid this tendency to separation is avoided.