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 citrate of ammonium and bismuth, 8 fluidounces.
Elixir of pyrophosphate of iron,. 8 fluidounces.
Mix them together.
Each teaspoonful of the finished elixir contains one grain each of ammonio-citrate of bismuth and of pyrophosphate of iron. This elixir should have an alkaline reaction.