Essays medical and experimental / [Thomas Percival].

  • Percival, Thomas, 1740-1804.
Date:
1772
Catalogue details

Licence: Public Domain Mark

Credit: Essays medical and experimental / [Thomas Percival]. Source: Wellcome Collection.

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    ftill further, when we confider that in the operation for the aneurifm a large artery is tied up, and the circulation of the blood for fome time almoft totally fuppreffed in the part, without any material injury to health. Morgagni relates that Valfalva affixed two ligatures to the carotids of a dog, who lived above twenty days after the operation, and might have continued longer if he had not been killed for th& purpole of diffeCtion. Is it then to be fuppofed that the obftruCtion of a few capillaries, which are united together by an infinite number of anaftomofing bran¬ ches, can be productive of fuch fatal con- fequences, whilft the courfe of the blood is flopped in large veffels with impunity ? Equally falfe and abfurd is the mechanical hypothefis concerning the operation of medicines, which is fuppofed to depend upon thefize, figure, and gravity of theit? confiituent particles. Thus chalybeates, for example, are recommended in ob- C 3 flruCtions