The oil of Rosemary

The oil of Rosemary, distilled from the flowering tops, as directedin the British Pharmacopceia, is a superior oil to that obtained from the stem and leaves, but nearly all the commercial oil is distilled from the stem and leaves of the wild plant before it is in flower. (Rosemary is one of the plants like lavender which grows better in England than anywhere, else, and English oil of Rosemary, though it is infinitely superior to what of other countries, is hardly found in commerce to-day.