Essential oil
A non-fatty evaporating oil, and a concentrated single constituent.
Practical Notes from Foreign Journals.
Classic texts: Journals: AJP 1885: Oils of Cassia and Cinnamon. Musk - Annual average exportation from Shanghai. Meat Juice. Precipitation. Honey - how best to store it. Fixed Oils, Fats and Ointments - benzoinating them.