This section is from the book "Monograph on Flavoring Extracts With Essences, Syrups, and Colorings", by Joseph Harrop . Also available from Amazon: Monograph On Flavoring Extracts With Essences, Syrups And Colorings.
Sarsaparilla Root (ground fine).....
Quillaia Bark (ground fine) ........................
Diluted Alcohol (sufficient to make),
Prepare by percolation.
One (1) to two (2) ounces of this Soda Foam is sufficient for one (1) gallon of Syrup. It produces an excellent foam and is quite tasteless, and is said to be capable of superseding entirely the various substances in common use.