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 rhubarb, 5 fluidounces.
Elixir of columbo, 5 fluidounces.
Simple elixir, 6 fluidounces.
Mix them together.
Each fluidrachm of the finished elixir represents about two minims each of fluid extract of rhubarb and fluid extract of columbo.