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
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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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    af, - dissolving half its weight of this salt, and I have accord- ingly found that one pint of water at 60° dissolves rather less than four ounces of subcarbonate of ammonia. From this statement itis evident that this preparation, simple ag it is, has been adopted without trial. On thé former method of preparing the Aqua Ammo- niz, Dr. Duncan has very propertly. observed, [Edinburgh Disp. 2 edit. p. 434], that it is more economical, as well as nfore scientific, to prepare this solution by dissolving a certain proportion of carbonate of ammonia in water ; from which observation the present method has probably been derived, * 5 LIQUOR AMMONIZ, The Aqua Ammoniz pure of the former Pharmaco- pceia, was prepared by adding two pints of cold, and six of boiling water, to two pounds of lime, and one of muriate of «mmonia: from this solution, when cool and clear, one pint was directed to be distilled. This pro- cess is not economical, because about one fourth of the solution rerhains diffused through the excess of lime; and also on account of the small quantity of product ob- tained in proportion to the quantity of fluid submitted to distillation. ‘The method possessed nevertheless, the in- dispensible requisite of being practicable, and the merit of simplicity and certainty. By taking the mean of seyeral experiments, I found the sp. gr. of this preparation to be .9543. which is sufhi- ciently concentrated for the usual medicinal or chemical purpose. It must be allowed to be much more impor- tant that the mode adopted for obtaining it, should yield a product of certain and equal, rather than of great D 2
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