The Formulas I., II., III. and IV. yield no perfectly water-soluble tinctures; in order to make them entirely miscible with aqueous liquids they are for our purposes best prepared with a mixture of half alcohol and half water; if not, the soluble essence must be prepared by gradually adding to Formula I., III. and IV. one third, to Formula II. one-half their volume (bulk) of water, shaking and clarifying them with powdered pumice stone as directed on page 662.

The tincture of vanilla and tonka bean and the compound vanilla extract are miscible with water, without any previous treatment.