Appendix to the Formulary for the preparation and mode of employing several remedies ... / by Robley Dunglison ; translated from the French of the fourth edition of Magendie's 'Formulaire', published in July.

  • Magendie, François, 1783-1855.
Date:
1824
Catalogue details

Licence: Public Domain Mark

Credit: Appendix to the Formulary for the preparation and mode of employing several remedies ... / by Robley Dunglison ; translated from the French of the fourth edition of Magendie's 'Formulaire', published in July. Source: Wellcome Collection.

    44/46 (page 46)
    MODE OF PREPARATION. Coarsely powdered jalap is macerated fo twelve or fourteen days in strong acetic acid : a highly-coloured tincture is thu obtained, which, when filtered, is super saturated with ammonia, and the mixture violently shaken: a sabulous deposit rapidh falls, and a few crystals form on the side: of the vessel. The deposit and crystals arc collected and washed with distilled water, agaii dissolved in a small quantity of concentratec acetic acid, and reprecipitated by ammoni; added in excess, which throws down the jala pine in small, white, acicular crystals. CHEMICAL PROPERTIES OF JALAPINE. Jalapine is without any perceptible smell o taste, and seems to be heavier than morphine quinina, or other substances of this class; it i scarcely soluble in cold water, and only t< a small extent in hot; ether has no effect upoi it : alcohol is its proper solvent. Very littl trouble is requisite to purify jalapine fron extractive or colouring matter, for which i appears to have buf a slight affinity. Mr. Hume considers that an ounce of jala] will, on careful treatment, afford about fiv grains of this substance.]