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 coto, 2 fluidounces.
Simple elixir, 16 fluidounces
Carbonate of magnesium, a sufficient quantity.
Triturate the fluid extract of coto with magnesium carbonate until a creamy mixture results, then gradually add the simple elixir, and filter. Each fluidrachm of this elixir represents such an amount of seven and one-half grains of coto as will dissolve in the liquid.