Characters. - "White, feathery, acicular prisms of a silky lustre, permanent in air.

Solubility. - It is soluble in water (24 parts at 15° C.) and spirit.

Reactions. - The aqueous solution gives a white curdy precipitate with nitrate of silver (HC1), and a white one with potash, soluble in excess (morphine). It exhibits the reactions of morphine. Heated on platinum foil, it leaves no residue (no inorganic salts).

Preparation. - Mix concentrated infusion of opium with chloride of calcium, decolorise by animal charcoal, precipitate the morphine by ammonia, and neutralise with hydrochloric acid.

Preparations. U.S.P. None

B.P.

Dose.

Liquor Morphinae Hydrochloratis.......................

4 1/2 grs. in 1 fl. oz., or 1 per cent. ........................

10-60 min.

Suppositoria Morphinae........................................

1/2 gr. in each suppository.........

„ „ cum Sapone.............

1/2 gr. ,, ,, ........

Tinctura Chloroformi et Morphinae...................

1 gr. in 1 fl. oz. .........................

5-10 min.

Trochisci Morphinae.............................................

1/36 gr. in each lozenge..............

1-4.

„ „ et Ipecacuanhae...........

1/36 gr. ,, ,, ..............

1-4.

Liquor Morphinae Hydrochioratis. Solution of Hydrochlorate of Morphine. - Add diluted hydrochloric acid (9 min.), rectified spirit (2 fl. dr.) to distilled water (6 fl. dr.), and dissolve hydrochlorate of morphine (4 1/2 gr.) in the mixture.

Tinctura Chloroformi et Morpbinae. Tincture of Chloroform and Morphine. - It contains in a 10-minim dose chloroform, 1 1/4 min.; ether, 1/3 min.; rectified spirit, 1 1/4 min.; hydrochlorate of morphine, 1/48 gr.; diluted hydrocyanic acid, 5/8 min.; oil of peppermint, 1/80 min.; liquid extract of liquorice, 1 1/4 min.; treacle, and syrup. It resembles chlorodyne.