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;
Fluid extract of valerian, 2 fluidounces.
Simple elixir, 14 fluidounces.
Alcohol, 1/2 fluidounce.
Carbonate of magnesium, a sufficient quantity.
Triturate the fluid extract of valerian in a capacious mortar with carbonate of magnesium in amount sufficient to form a creamy mixture, then gradually add the simple elixir, stirring well, and filter. Lastly, mix the filtrate with the alcohol.
Each fluidrachm of the finished elixir will contain of seven and one-half minims of fluid extract of valerian such an amount as the menstruum is capable of dissolving.