Materia Medica and Therapeutics, Vol. 2: Inorganic Substances (Classic Reprint)

Materia Medica and Therapeutics, Vol. 2: Inorganic Substances (Classic Reprint)
ISBN-10
1331963435
ISBN-13
9781331963431
Category
Medical
Pages
352
Language
English
Published
2015-07-21
Author
Charles D. F. Phillips

Description

Excerpt from Materia Medica and Therapeutics, Vol. 2: Inorganic Substances This metal occurs pure, but more often in alloy, as with lead (galena), or combined with sulphur (argentite), chlorine (horn silver), and with iodine, bromine, etc. Refined silver is placed in the Pharmacop ia as a source of the nitrate, but is otherwise used only in the form of silver-leaf as a coating for pills: its officinal compounds are the nitrate and the oxide. Prepared by crystallization from a solution of pure silver in dilute nitric acid: when fused and solidified in moulds, it constitutes the small pencils known as "lunar caustic." Characters And Tests. - The crystals are tabular and colorless, and form a neutral solution with distilled water: sp. gr. 4.3. They are soluble in four parts of rectified spirit; when pure they do not blacken on mere exposure to light, but do so, and readily decompose, on continued contact with any organic substance. An aqueous solution of the nitrate is precipitated by any soluble chloride, a characteristic curdy-white chloride of silver being formed, which becomes dark on exposure to the air: it is soluble in ammonia, insoluble in nitric acid. A black sulphide of silver is precipitated from a solution of the nitrate by passing through it sulphuretted hydrogen. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."

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