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;
Acetate of potassium, 640 grains.
Simple elixir, 15 1/2 fluidounces.
Dissolve the acetate of potassium in the simple elixir, and filter if necessary.
Each fluidrachm (teaspoonful) of the finished elixir contains five grains of acetate of potassium.
In former editions of our work each fluidrachm contained four grains of acetate of potassium. We change the proportion in this edition of our work to conform to the strength established by the National Formulary.