An experimental examination of the last edition of the Pharmacopoeia Londinensis; with remarks on Dr. Powell's translation and annotations / [Richard Phillips].

  • Richard Phillips
Date:
1811 [1812?]
Catalogue details

Licence: Public Domain Mark

Credit: An experimental examination of the last edition of the Pharmacopoeia Londinensis; with remarks on Dr. Powell's translation and annotations / [Richard Phillips]. Source: Wellcome Collection.

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    There can be no doubt that all fluids, and especially the more dense, are apportioned with greater precision by weighing than by measuring, and as might have been expected, nearly all the exceptions to the general method of measurement, occur in some instances of the employ- ment of mercury, and the stronger acids : now although the measuring of acids appears to me to be in all cases sufficiently accurate for the purposes of medicine, yet two methods' of effecting the same purpose being adopted by the College, it might reasonably be supposed that the more exact one had been resorted to in those preparations in whifch accuracy is of the greatest importance ; the re¬ verse is however unfortunately the case, as may be proved by evidence which, although others may mistrust, the College cannot object to. The following are the pre¬ parations in which the acids are to be weighed. Acidum Muriaticum ~- Nitricum Ferri Sulphas Hydrargyri Oxymurias •-—— Nitrico-oxydum Zinci Sulphas Spiritus -ZEtheris Sulphuric! --—-—- Nitrici Now upon examining these preparations, it will ap¬ pear that the last only would be essentially altered, even by a much greater variation in the proportion of the acid than could arise from the difference of the two methods in question; it will a]so be found that the acids employed, either enter into combination, or are partially or totally decomposed j and these circumstances, as they diminish
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