1 gr. of atropia is contained in 2 fl. drm. of liquor atropiæ. 1 gr. of sulphate of atropia in 2 fl. drm. of liquor atropiæ sulphatis. 8 gr. of atropia are contained in 1 oz. of unguentum atropiæ. BELLADONNA. 1 gr. of dried belladonna is contained in about 22 min. of tinctura belladonnæ. Each fluid part of linimentum belladonæ contains the active portion of a solid part of the dried root. CANNIBIS INDICA. 1 gr. of alcoholic extract of Indian hemp is contained in about 22 min. of tinctura cannabis Indicæ. CANTHARIDES. 1 gr. of cantharides is contained in about 88 min. of tinctura cantharidis. COLCHICUM. 1 gr. of dried corm of colchicum is contained in about 5-1/2 min. of vinum colchici. 1 gr. of colchicum seeds is contained in about 9 min. of tinctura colchici. DIGITALIS. 1 gr. of dried leaves of digitalis is contained in about 9 min. of tinctura digitalis. HEMLOCK. 1 gr. of hemlock fruit is contained in about 9 min. of tinctura conii. IPECACUANHA. 1 gr. of ipecacuanha root is contained in about 22 min. of vinum ipecacuanhæ. 1 gr. ipecacuanha root is contained in _twelve_ morphia and ipecacuanha lozenges. 1 gr. of ipecacuanha root is contained in 4 ipecacuanha lozenges. NUX VOMICA. 1 gr. of nux vomica seed is contained in about 11 min. of tinctura nucis vomicæ. (STRYCHNIA.) 1 gr. of strychnia is contained in 2 fl. drm. of liquor strychniæ. OPIUM. (ACETATE OF MORPHIA.) 1/4 gr. of acetate of morphia is contained in 30 min. of liquor morphiæ acetatis. (HYDROCHLORATE OF MORPHIA.) 1/4 gr. of hydrochlorate of morphia is contained in 30 min. of liquor morphiæ hydrochloratis. 1/4 gr. of hydrochlorate of morphia is contained in _nine_ morphia lozenges. 1/4 gr. of hydrochlorate of morphia is contained in _nine_ morphia and ipecacuanha lozenges. 1/2 grain of hydrochlorate of morphia is contained in _each_ morphia suppository. (OPIUM DRIED SUFFICIENTLY TO BE POWDERED.) 1 gr. of opium is contained in 14-1/2 min. of tinctura opii. 1 gr. of opium is contained in 14-1/2 min. of vinum opii. 1 gr. of opium is contained in 1/2 fl. oz. of tinctura camphoræ composita. 1 gr. of opium is contained in 96 min. of tinctura opii ammoniata. 1 gr. of opium is contained in 1 fl. oz. of enema opii. 1 gr. of opium is contained in 5 gr. of pilula saponis composita. 1 gr. of opium is contained in 8 gr. of pilula plumbi cum opio. 1 gr. of opium is contained in 10 gr. of pulvis ipecacuanhæ compositus. 1 gr. of opium is contained in 20 gr. of pulvis kino compositus. 1 gr. of opium is contained in 40 gr. of pulvis cretæ aromaticus cum opio. 1 gr. of opium is contained in 10 gr. of pulvis opii compositus. 1 gr. of opium is contained in about 13-1/2 gr. of unguentum gailæ cum opio. 1 gr. of opium is contained in _ten_ opium lozenges. 1 gr. of opium equals about 1/2 gr. of extractum opii.