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;
Compound fluid extract of gentian, 2 fluidounces.
Simple elixir, 16 fluidounces
Carbonate of magnesium, a sufficient quantity.
Triturate the compound fluid extract of gentian with carbonate of magnesium in sufficient amount to form a creamy mixture, then gradually add the simple elixir, and filter.
Each fluidrachm of this elixir represents the virtues of seven and one-half minims of compound fluid extract of gentian.
The National Formulary prepares this substance from the solid extract of gentian. The product is similar to that of our formula.