Three memoirs on the developement and structure of the teeth and epithelium, read at the ninth annual meeting of the British Association for the Encouragement of Science, held at Birmingham in August, 1839 / by Alexander Nasmyth.
- Date:
- 1841
Licence: Public Domain Mark
Credit: Three memoirs on the developement and structure of the teeth and epithelium, read at the ninth annual meeting of the British Association for the Encouragement of Science, held at Birmingham in August, 1839 / by Alexander Nasmyth. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
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![together with the former, laid on a glass, compressed a little, and then examined with the high powers of the microscope. The different layers of cells will be seen, and the transition into ivory may be observed, (as shown in [PI. C. 9] Pulp No. 14, where the different gradations of ossification are marked by the shade of colour.) [The diagram marked Pulp, No. 6 A. [at plate C. 7] represents the general arrangement of the reticular leaflets of the surface of the pulp. In No. 6 B. is seen a beautifully-organized single leaflet of this reticular surface, in the pre-existing cells of which the earthy matter is in course of depo- sition, and the process of ossification is seen to be gradually extending from its centre towards its cir- cumference. No. 8 [plate C. 8] shows the blood-ves- sels coursing beneath the reticular formative sur- face. This drawing is an exact copy of the pre- paration, in which, as is seen, the blood-vessels have been ruptured in two places, in separating the ivory from the pulp, owing to the close con- nexion between the reticular surface and the ivory already formed. Pulp No. 9, with the title, Ossi- fication, or JDevelopement of Ivory, and the following drawings, [see Plates C. 8 and 9,] are a selection from the interesting preparations which I have made for the purpose of elucidating the process of the formation of ivory. They display under vari- ous aspects the different appearances, some con- stant, the others incidental, which present them- selves on the removal of the superincumbent ivory](https://iiif.wellcomecollection.org/image/b21982910_0065.jp2/full/800%2C/0/default.jpg)
