This section is from the book "A Treatise On Beverages or The Complete Practical Bottler", by Charles Herman Sulz. Also available from Amazon: A Treatise On Beverages.
We append two Formulae for making them:
Soluble Essence. - For the carbonators' purpose this Formula will be better and be water soluble: Oil of neroli, mixed, if desired, as in other Formula, one drachm; alcohol, and distilled water, of each, eight ounces; cut the oil with pumice and sugar, as directed; dissolve and filter.