Case of recovery from a poisonous dose of strychnia : with observations on the tests for organic alkalies / by Thomas Anderson, M.D.

  • Anderson, Thomas, 1819-1874.
Date:
[1848]
Catalogue details

Licence: Public Domain Mark

Credit: Case of recovery from a poisonous dose of strychnia : with observations on the tests for organic alkalies / by Thomas Anderson, M.D. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    4). Tlie latter form is, however, much better mai-ked m the crys- tals deposited, after some hours, from a dilute solution, which are still quite microscopic, although somewhat larger than those repre- sented in the figure. . Morphia.—In solutions of morphia, ammonia produces no preci- pitate at the moment of mixture; but, in the course of a longer or shorter period, according to the degree of dilution, crystals are seen to form, which gTadually increase in size, and possess the torm represented in Fig. 5. Salts of morphia are not precipitated by sul- phocyanide of potassium, unless the solution be liighly concentrated. Narcotine—is precipitated by ammonia in branched groups of crys- tals of a pointed form (Fig 6). In concentrated solutions, a preci- Fig. 5. Fig- 6. pitate is thrown down by sulphocyanide of potassium, which dissolves readily in hot water, and is deposited again on coohng. Under the microscope it is found to be perfectly amorphous. Cinchonine—is obtained by precipitation with ammonia, in the form of minute granular masses, made up of more or less distinctly acicu- lar crystals, radiating fi'om a centre. It is, however, a Httle difficult to obtain them well marked, and they not unfi^equently appear as a confused mass of granules, in which the radiated structure is very Fig. 7. Fig. 8. imperfectl;^ seen. They form best when the solutions are rapidly mixed, lig. 7 represents these crystals. With sulphocyanide of potassium, cinchonine gives a precipitate consisting of six-sided plates, together with a variety of irregular crystalhne masses, and a few rectangular plates (Fig. 8). When formed by mixing in a test tube, with agitation, and allowing it to stand for some time, the crystals are still microscopic, but much more definite, and some-