An Emulsion with Harts-horn.
Take Decoction of burnt Harts-horn (not clear but white) 1 quart; sweet Almonds blanch'd, white Poppy seeds, each half an ounce; make an Emulsion, to which (when strained) add strong Cinnamon Water 2 ounces; Oil of Nutmeg 1 drop; fine Sugar 1 ounce, mix.
Its used with happy Success for constant drink, in such Fevers as are accompanied with a symptomatic Diarrhea.
Calcin'd Harts-horn being a meer Terra Damnata, wholly bereav'd of all Salts, must needs, as it boils in Water, and leave its Pores empty and esurient: And then that esurient Water taken into our Viscera and Vessels, will greedily suck into it whatsoever Salts it finds, and will carry them out of the Body with it. And (as I judge) this is the manner how it correcteth the Ventricle and Intestines, and edulcorateth the Blood and Juices.
Dr. Mayow (de Thermis Bath, 264.) lends us some light in this Matter, saying, if the Salt of Tartar be mixt with Spring Water, a Precipitation follows, and it turns white, which is certain Proof, that Spring water have an acid Salt in them.
Thomas Fuller
Pharmacopeia Extemporanea 1710