A System of Materia Medica and Pharmacy; Including Translations of the Edinburgh, London, and Dublin Pharmacopoeias

A System of Materia Medica and Pharmacy; Including Translations of the Edinburgh, London, and Dublin Pharmacopoeias

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1828 edition. Excerpt: ... heat for two hours, or until diluted acetic acid dropt upon it does not excite effervescence." Magnesia Usta. Calcined Magnesia. Dub. "Take of Magnesia, any quantity. Put it into a crucible, and submit it to a strong heat for two hours. Keep the magnesia, when cold, in a glass vessel. By the heat applied, the carbonic acid of the carbonate, and a considerable portion of its water, are expelled, and the pure magnesia remains. It loses rather more than half its weight. A smaller quantity, therefore, of the pure magnesia, will produce the same effect as a larger of the carbonate. It is preferred to the latter, both from this circumstance, and also where, from the abundant acidity on the stomach, flatulence is occasioned by the disengagement of carbonic acid when the carbonate is used. The subcarbonate employed in its preparation requires to have been very carefully washed; for if even a minute quantity of sulphate of potash adheres to it, which is liable to be the case where the washing has not been thoroughly performed, this seems to be decomposed by the heat applied for the calcination, and a disagreeable sulphureous taste is communicated to the calcined magnesia. CftAf. XXIII. METALLICA--METALLIC PREPARATIONS. Metals are distinguished by their opacity, brilliancy, and density. They are fusible and volatile at very different degrees of heat; and at various temperatures they combine with oxygen, forming oxides, and, in two or three cases, compounds possessed of acid properties. The metals used in medicine are, Silver, Quicksilver, Copper, Iron, Lead, Tin, Zinc, Bismuth, Antimony, and Arsenic. Metals in their pure state, being insoluble in the animal fluids, can scarcely exert any action on the system. Tin, by a mechanical action, is...show more

Product details

  • Paperback | 178 pages
  • 189 x 246 x 10mm | 327g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123662257X
  • 9781236622570