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 valerianate of ammonium, 16 fluidounces.
Strychnine, 1 1/4 grains.
Acetic acid. a sufficient quantity.
Triturate the strychnine in a mortar with acetic acid in sufficient amount to effect its solution, and mix this with the elixir of valerianate of ammonium. If not of acid reaction, add enough acetic acid to change blue litmus paper to red.
Each fluidrachm (teaspoonful) of the finished elixir contains two grains of valerianate of ammonium, and one-hundredth of a grain of strychnine as an acetate of that alkaloid.