A critical analysis of the memoir read by Dr. Barry before the Academy of Sciences : on the 8th of June, 1825, at the Institute of France, on atmospheric pressure; being the principal cause of the progression of the blood in the veins. / By Henry Searle.

  • Searle, Henry, active 1827.
Date:
1827
Catalogue details

Licence: Public Domain Mark

Credit: A critical analysis of the memoir read by Dr. Barry before the Academy of Sciences : on the 8th of June, 1825, at the Institute of France, on atmospheric pressure; being the principal cause of the progression of the blood in the veins. / By Henry Searle. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    extended in the direction from its base towards its thin edge, more than one-twelfth of an inch : but if the entire lung were moved forward equally, it is clear that it would not become distended, but merely displaced, the base then must remain stationary, while its distant edge were moved one-twelfth of an inch; so that if the inertia of the whole lung be considered to be overcome during inspiration, its mean motion must be attributed to it, which is half the two extremes: one being as nothing, and the other one-twelfth, making one-twenty-fourth of an inch. But since all the larger bronchial tubes are un- yielding, being cartilaginous, it is most probable that a great proportion of the lungs are not dis- turbed, particularly towards the base, where the principal larger blood vessels are to be found. Assuming that this calculation be nearly correct, it can readily be perceived, that the lighter and more delicate parts of the lungs can be moved one-twelfth of an inch in any two directions, perpendicular to each other, during their usual distension. For the sake of argument, suppose that the