Arnold James Cooley, Cooley's Cyclopædia of Practical Receipts and Collateral Information in the Arts…
“ Factitious orange juice is made by dissolving citric acid, 1 oz., and carbonate of potassa, 1 dr., in water, 1 quart, and digesting the solution on the peel of half an orange until sufficiently flavoured; Narbonne honey or white sugar is then added to impart the necessary sweetness. Instead of orange peel, 5 or 6 drops of oil of orange peel, with 1⁄2 fl. oz. of tincture of orange peel, may be used.Orange peel (CORTEX AURANTII) is an agreeable, stomachic, bitter tonic, especially useful as an adjunct to more active medicines. ”
