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;
Mix equal amounts, by measure, of elixir of phosphate of cinchonine and elixir of phosphate of cinchonidine.
Each fluidrachm of the finished elixir contains of phosphate of cinchonidine an amount which is equivalent to one-half grain of cinchonidine, and of phosphate of cinchonine an amount which is equivalent to one grain of cinchonine