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;
Lactucarium, 256 grains.
Simple elixir, 16 fluidounces.
Triturate the lactucarium with the simple elixir, allow the mixture to remain in a covered vessel for twenty-four hours, shaking occasionally, then filter it.
Each fluidrachm (teaspoonful) of the finished elixir contains the properties of two grains of lactucarium.