2390. In Atonic Dyspepsia, especially when due to drunkenness, and in febrile and inflammatory states, this drug proves very useful. It is not, however, in any way equal to digitalis in its power of steadying the heart in fever, and is in every way inferior in this connection.

2391. Collodion Vesicans. Blistering Collodion. Consists of blistering fluid twenty parts, Pyroxylin one part.

Med. Prop. and Action. A convenient preparation for vesication. It was introduced into the B. Ph. of 1885. It represents the collodion cum cantharide of the U. S. Ph., and a similar preparation in the German Pharmacopoeia. In physical properties it resembles flexible collodion (q.v.), except in its dark color.

Therapeutic Uses. See Cantharis, p. 158.

2392. Cupri Nitras. Nitrate of Copper. A salt obtained by dissolving copper in nitric acid.

Med. Prop. and Action. A strong corrosive body, mainly of service as a caustic. It occurs in large blue crystals, which are highly deliquescent and caustic. It is employed only externally.

2393. Elaterinum Elaterin. The active principle of Elaterium.

Med. Prop. and Action. A powerful hydragogue, purgative, and cathartic. It is obtained by exhausting elaterium with chloroform, adding ether to the solution, then collecting the precipitate. This is washed with ether, and purified by re-crystallization from chloroform. As it is far more active than elaterium it must be given with caution, especially to the enfeebled, to the aged, and to children. Excessive doses produce gastro-enteritis.

Dose:-gr.

16.

Therapeutic Uses. See Elaterium.

INDEX OF DISEASES.

(The Asterisk* denotes the paragraphs which are most deserving of attention.)

Aphtha and aphthous ulceration of the Arthritis, see Gout