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;
Valerianate of zinc, 128 grains.
Distilled water, 6 fluidounces.
Simple elixir, 10 fluidounces.
Triturate the valerianate of zinc with the water, and then add the simple elixir. When solution of the salt results filter the liquid. Should the valerianate of zinc refuse to dissolve, cautiously drop in a little hydrochloric acid, care being taken that only enough to effect its solution is added.
Each fluidrachm (teaspoonful) of the finished elixir contains one grain of valerianate of zinc.
In former editions of our publication the strength was one-half grain of valerianate of zinc in each fluidrachm. We change in this edition to one grain in order to conform to the strength established by the National Formulary.