Volume 4

Pharmacologia; comprehending the art of prescribing upon fixed and scientific principles; together with the history of medicinal substances / By J.A. Paris.

  • Paris, John Ayrton, 1785-1856.
Date:
1825
Catalogue details

Licence: Public Domain Mark

Credit: Pharmacologia; comprehending the art of prescribing upon fixed and scientific principles; together with the history of medicinal substances / By J.A. Paris. Source: Wellcome Collection.

    29/526 (page 21)
    to be seen beautifully crystallized on its surface. It exists also in vanello; cinnamon; cloves; ambergris; in the urine of children, and sometimes in that of adults, and always in that of quadrupeds living on grass and hay. ACIDUM CITRICUM. (Crystalli) Citric Acid. Concrete Acid of Lemons. Quaxities. Form, crystals which are right rhom- bic prisms, white, semi-transparent, and persistent. Taste, extremely acid, almost caustic. SoLUBILITY. £2j of cold water dissolves 3 x, but of boiling, 3 ij. 3x of the crystals dissolved in a pint of water, are about equivalent to one pint of lemon juice, the solution however if kept is liable to spontaneous decomposition. The following table of equivalents may be found of practical use; the author is aware that they do not exactly agree with the proportions of Dr. Haygarth, but they are the results of careful and repeated experi- ments, and as such they are submitted with confidence, EQUIVALENT PROPORTIONS OF CONCRETE CITRIC ACID AND LEMON JUICE, NECESSARY FOR THE NEUTRALIZATION OF ALKALINE SALTS. —_——. Citric Acid. Lemon Juice. A Scruple of Alkalies. ae grs. X- f 3iij Carbonate | of Potass grs. Xv. f 3 iii Sub-Carbonate of Potass gts. XXV. f 3 vij Sub-Carbonate of Ammonia.