Observations on the action of the broom-seed in dropsical affections / by Richard Pearson.

  • Richard Pearson
Date:
1835
Catalogue details

Licence: Public Domain Mark

Credit: Observations on the action of the broom-seed in dropsical affections / by Richard Pearson. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    ing the Ioduret to the air, that its properties, and consequently its medicinal powers, are im- paired : thence, it is preferable to keep it in solution, or in the state of the Hydriodate. If the solution be prepared with a definite quantity of iodine, as already described, it will keep without changing its characters: but as it is usually made by dissolving the Ioduret in dis- tilled water, it requires to be rendered neutral by the following means. Introduce, into a flask, the solution of any given strength, and place in it two or three doubles of clean, soft Iron wire, sufficiently long to extend to the sur- face of the fluid; boil it for a few minutes, and then leave it at rest until the solution become clear, after which it may be either decanted off from the precipitate which forms, or filtered : no further change takes place in a solution thus treated, if it be kept in a blackened or a green bottle, however long it may be preserved. In this process, the wire affords Iron to saturate any free Iodine present in the solution, or that may have been extricated by the formation of the Peroxide of Iron in the Ioduret; and a per- fectly neutral solution being thus obtained, by the immediate conversion of the new-formed Ioduret into the Hydriodate of the Protoxide, no subsequent change takes place as long as the solution is kept secluded from the light. It is not easy to explain this influence of light
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