Notes on some of the chemical reactions of strychnia / by T. G. Wormley.

  • Wormley, Theodore George.
Date:
1859
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Licence: Public Domain Mark

Credit: Notes on some of the chemical reactions of strychnia / by T. G. Wormley. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    in about twenty minutes they are just perceptible to the naked eye. 6. SuLFHOCYANIDE OF POTASSIUM. 1. -j40, gives an immediate mass of white crystals. 2. ^ J-7# in a few seconds the crystals are very abundant. 3. T™, by rubbing, in a few minutes crystals begin to form. 4. after several minutes, a few crystals may be observed upon the border of the drop with the microscope. 7. Tannic Acid. 1 1. To^oo> gives an immediate white curdy precipitate. 2. roioo> gives very satisfactory results. 3. 3oioo» after a few minutes the ppt. is quite perceptible. 4. 4o4oo> a^ter several minutes it is just possible to observe a i white cloudiness. The satisfactory limit of the test is when it is applied to a drop of fluid holding in solution ^P^th its weight of strychnia. The ppt. is very soluble 4n acetic acid ; and if obtained from dilute solu- tions, it is, also, soluble in a drop of potash, giving a red liquid; but when produced from strong solutions, the ppt. will not all dissolve in a drop of potash solution. / 8. Bichloride of Platinum. 1. T^00, an immediate yellow amorphous ppt., soon becoming ] granular. 2. 3 o1of> m a few moments an amorphous ppt, which soon be- comes granular. 3. 5 oVf> m a few minutes the results are very good. 4. Toio o» if the solution be rubbed, small granules begin to ap- « pear in a few minutes, and soon the result is satisfactory. 9. Terchloride of Gold. 1. to'ooj gives a bright yellow amorphous ppt., which soon be- comes partly granular ; most of the granules float upon the surface of the drop. A portion of the ppt. collects into little yellow flakes. 2. toxtoq-, gives an almost immediate precipitate. 3. 3oroo> gives very satisfactory results. ► 4. 4 ottof* af this degree of dulution the ppt. is still perceptible, 1 but not satisfactory.