Contraction. - Apm.

Present name. - Apomorphia Hydrochlorate. C17H17No2, Hc1.

An alkaloid, prepared from Hydrochlorate of Morphia by heating it with considerable excess of Hydrochloric Acid in a thick sealed tube to nearly 300° F. for two or three hours. The product is then diluted with distilled water, precipitated with Bi-carbonate of Soda and re-dissolved in ether or chloroform. On agitating a minute quantity of Hydrochloric Acid with the last solution, crystals of the Hydrochlorate are formed on the sides of the vessel. These are first drained, then washed with a little cold water and re-crystallized from solution in hot water, and finally dried on filtering-paper.

Characters and Tests. - In small crystals. It gives with Perchloride of Iron a dark purple-amethyst colouration, with Nitric Acid a brucia red, and with Bichromate of Potash and Sulphuric Acid a strychnia red.

Reference to Horn. Proving. - Hale's New Remedies. Annals of the British Homoeopathic Society, etc, vol. vii., p. 42, "On the Physiological Action of Certain Alkaloids derived from Opium,"by Dr. J. Galley Blackley; and p. 233 same volume, "On some Points in the Therapeutics of Apomorphia," etc, by Dr. D. Dyce Brown.

Preparations. - Trituration. Solution in rectified spirit.