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The London Dispensatory, containing : 1. the Elements of Pharmacy ; 2. the botanical Description, natural History, chemical Analysis, and medicinal Properties of the Substances of the Materia Medica ; 3. the pharmaceutical Preparations and Compositions of the Pharmacopoeias of the London, Edinburgh, and Dublin Colleges of Physicians ; the Whole forming a Practical Synopsis of Materia Medica, Pharmacy, and Therepeutics
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part in. Metallic Preparations. — Silver.

509

or more, three times a day; but little advantage is gained, unlessits use be preceded, by a course of purgatives. The best form ofadministering it is that of pill made with crumb of bread. Butthe chief use of nitrate of silver is as an external application to de-stroy strictures of the urethra, warts, fungous excrescencies, andincipient chancres. In solution, in the proportion of gr. ij tof*5J of distilled water, it forms a good injection in fistulous sores;and a lotion in that disease of the gums generally denominatedscurvy, in which the gum becomes spongy, and its edges hangloosely about the necks of the teeth. When this latter disease,however, rises to a great height, the sore edges of the gumshould be touched with a hair pencil dipped in a much strongersolution, in the proportion of 5j of the nitrate of silver to fy ofdistilled water. 1 A solution of one part of the nitrate in 1000parts of water is recommended by Hahnemann 2 as an applica-tion to old sores, and for healing the ulcers of the mouth pro-duced by the use of mercurials.

When given in too large doses, it acts as a poison on thesystem, producing symptoms resembling those induced by theother corrosive poisons. M. Orfila regards common salt asthe antidote of this poison, when given sufficiently early to pre-vent the specific action of the nitrate on the coats of the sto-mach 3 : but at the same time, local and general bleeding, tepidbaths, and emollient fomentations and glysters must be em-ployed, if any symptom of abdominal inflammation be per-ceived.

PRMFARATA EX ARSENICO.

Preparations of Arsenic.

ARSENICI OXYDUM SUBLIMATUM. Lond.' Pre-pared Oxide of Arsenic.

" Reduce oxide of arsenic to powder; then put it into a cru-cible, and, applying heat, sublime it into another crucible in-verted over the first."

The greater part of the oxide of arsenic found in the shops,is in the form of semivitreous cakes, which are the product ofa second sublimation of the oxide, after it is obtained from

• Fox on the Naturat History and Treatment of Diseases of the Teeth.

1 Annates it Chimie, iii. 308.

3 Traxti ats Poisons, Sfc. lorn. i. p. 49.

+ Oxide d'arseuique pure (F.) Weisses Arsenick (C) Anenico blaura I.)

 
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