An essay on the absorbent vessels : shewing that their action is not liable to be influenced by the artificial agents commonly applied / by Henry Searle.

  • Searle, Henry.
Date:
1823
Catalogue details

Licence: Public Domain Mark

Credit: An essay on the absorbent vessels : shewing that their action is not liable to be influenced by the artificial agents commonly applied / by Henry Searle. Source: Wellcome Collection.

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    offered to a ring of this nature, it will yield and become contracted in its area. Allow this force a given power, sufficient to contract it one half; let it afterwards be ap¬ plied internally with a view to dilate the ring, and it will scarcely produce the least effect: in consequence of a ring, exactly circular, being already in its utmost state of natural extension; therefore, if the ring be made to contract its area, it will be brought into a state of relaxation; but, if to enlarge it, into that of a high degree of tension. The force employed in the former instance must exert its influence upon the convex surface of the ring, which will seldom offer much resistance, and the pressure between them will be correspondently slight. But in the latter case, where the force is applied to the concave surface, in attempting to expand the ring, it will be resisted very powerfully, and the pressure between them will be very considerable.
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