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;
Fluid extract of thuja occidentalis, 2 fluidounces.
Simple elixir, 14 fluidounces.
Alcohol, 2 fluidounces.
Carbonate of magnesium, a sufficient quantity.
Triturate the fluid extract of thuja with carbonate of magnesium until of a creamy consistence, then gradually add the simple elixir, filter, and add the alcohol. A formula for elixir of thuja occidentalis was proposed by Mr. W. H. Laws in New Remedies, 1877. This is one of the class of substances which, in our opinion, cannot be satisfactorily exhausted by means of an aqueous menstruum. The characteristic principles of thuja are oily and resinous, and these are largely precipitated by any aqueous liquid.
Each fluidrachm of this elixir represents, less the substances precipitated by the simple elixir, seven and one-half minims of fluid extract of thuja occidentalis.