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 phosphate of quinine and elixir of phosphate of cinchonidine, equal amounts by measure.
Mix them together.
Each fluidrachm (teaspoonful) of the finished elixir contains of phosphate of quinine and of phosphate of cinchonidine an amount which is equivalent to one-half grain each of quinine and of cinchonidine.