A narcotic is a remedy which, in _medicinal_ doses, allays morbid sensibility, relieves pain, and produces sleep; but which, in overdoses, produces coma, convulsions, and death. The quantity necessary to produce these results varies in different individuals. We shall mention a few of those most frequently employed. [Illustration: Fig. 134. Henbane.] HENBANE (_Hyoscyamus Niger_). The leaves and seeds are used. Henbane, in large doses, is a powerful narcotic and dangerously poisonous. In medicinal doses, it is anodyne and antispasmodic; it allays pain, induces sleep, and arrests spasms. _Dose_--Of the fluid extract, five to ten drops; of the solid extract, from one-half to one grain; of the concentrated principle, Hyoscyamin, from one-twelfth to one-fourth of a grain. INDIAN HEMP (_Cannabis Indica_). An East Indian plant. _Dose_--Of the extract, from one-fourth to one-half grain, of the tincture, from three to eight drops; of the fluid extract, from two to five drops. The plant known as Indian Hemp, growing in this country, possesses very different qualities. [Illustration: Fig. 135. Stramonium. ] STRAMONIUM (_Datura Stramonium_). Stramonium, also known as Thorn-apple, in large doses is a powerful narcotic poison. In medicinal doses it acts as an anodyne and antispasmodic _Dose_--Of extract of the leaves, from one-half to one grain; of the fluid extract, from three to six drops. NERVINES. These are medicines which act on the nervous system, soothing excitement and quieting the condition known as "nervousness." HOPS (_Humulus Lupulus_). _Dose_--Of infusion, one to three ounces; of the fluid extract, one-fourth to one-half teaspoonful of the concentrated principle, Humulin, two to three grains. [Illustration: Fig. 136. Scull-cap. ] SCULL-CAP. (_Scutellaria Lateriolia_). The herb is used. It is also known as Mad-dog Weed. This is a valuable remedy. _Dose_--Of infusion, one to two ounces, of the fluid extract, ten to twenty drops; of the concentrated principle, _Scutellarin_, one to two grains. LADY'S SLIPPER (_Cypripedium Pubescens_). The root is used. _Dose_--Of the infusion, one-half to one-ounce; of THE fluid extract, one-fourth to one-half teaspoonful; of the concentrated principle, Cypripedin, one to two grains. PULSATILLA (_Pulsatilla Nigricans)._ We employ the German tincture, prepared from the green herb. In many of the distressing nervous complications to which both males and females are subject in certain diseases of the generative organs, we have found it very effectual. The dose is from two to eight drops.