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;
Hypophosphite of calcium, 256 grains.
Citric acid, 30 grains.
Simple elixir, enough to make l 6 fluidounces.
Dissolve the hypophosphite of calcium in the simple elixir, add the citric acid, and filter. Each fluidrachm contains two grains of hypophosphite of calcium.