A probationary essay on the formation of new blood-vessels : submitted, by the authority of the President and his Council, to the examination of the Royal College of Surgeons of Edinburgh, when candidate for admission into their body, in conformity to their regulations respecting the admission of ordinary Fellows / by Allen Thomson.

  • Thomson, Allen, 1809-1884.
Date:
[1832]
Catalogue details

Licence: Public Domain Mark

Credit: A probationary essay on the formation of new blood-vessels : submitted, by the authority of the President and his Council, to the examination of the Royal College of Surgeons of Edinburgh, when candidate for admission into their body, in conformity to their regulations respecting the admission of ordinary Fellows / by Allen Thomson. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    ON THE FORMATION OF NEW BLOODVESSELS. The power of reproducing parts of the body which have been lost or destroyed, seems to be possessed in very different degrees by different classes of animals, and to vary much also in deejee in the different textures of which their bodies are composed. It seems to be now fully established by ob- servation and experiment, that the lower the place an ani- mal holds in the scale of organization, and the more simple its structure, the more easily is the loss of any portion of its substance repaired. In many of the Invertebrated Animals the loss of several of the more complicated organs of the body is repaired with considerable rapidity by the production of a part very simi- lar to that lost, in form, size, and structure. The fresh- water polypus^ {Hydra viridis)^ the star-fish* {Asterias), the sea anemone ^ (Jdmifl), various kinds of snails^ {Li- * A. Trembley, M^moires pour servir I'histoire d'un genre de Polypes d'eau douce. 4to. Laid. 1744. 4e Mdm. ^ Trembi.ey, p. 294. C. Bonnet, Considerations sur les Corps orga- nis6s, torn. i. & ii. p. Reaumuh, Memoires pour servir \ I'liistoire des Insectes, torn. iv. Preface, p. Ix. M. G. de Villahs repeated these experi- ments. ' Spallanzani, Precis d'un ouvrage sur les ll^productions Animales A