An experimental inquiry, into the principles of nutrition, and the digestive process / by John R. Young.

  • Young, John Richardson, 1782-1804.
Date:
1803
Catalogue details

Licence: Public Domain Mark

Credit: An experimental inquiry, into the principles of nutrition, and the digestive process / by John R. Young. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    [ 13 ] and firmly tied in this situation, each of the threads were then tied to the fore legs of the larger frog also : thus situated it was impossible the small frog could be entirely swallowed down, or thrown out of the stomach of the larger one. They were then put in a bason containing a little water, where they remained undisturbed for one day and a half. The small frog upon being drawn out was perfectly alive, and its whole body covered with gastric juice, and not the least dis- solved in any part. The same frog was then killed, and again introduced into the stomach of the large one in the very same situation as just described. In five hours it was drawn out, when its whole surface was completely dissolved. Having this clear proof of the living principle, resisting the action of the gastric fluid, it was next proposed to try whether the action of this fluid would be resisted by a part in which the liv- ing principle was weakened—The great sciatic nerve of a living frog was therefore divided, and introduced into the stomach of a large one as above—it was drawn out in twelve hours, when it was still alive, and the paralized extremity was quite sound. THE END.