A short system of comparative anatomy / translated from the German of J. F. Blumenbach ... by William Lawrence ... with numerous additional notes and an introductory view on the classification of animals, by the translator.
- Johann Friedrich Blumenbach
- Date:
- 1807
Licence: Public Domain Mark
Credit: A short system of comparative anatomy / translated from the German of J. F. Blumenbach ... by William Lawrence ... with numerous additional notes and an introductory view on the classification of animals, by the translator. Source: Wellcome Collection.
Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.
78/530 page 36
![however, perhaps no animal of this clafs, in which the firft appearance, and fubfequent removal of the deciduous teeth take place, at fo late a period of life as in man. S 30. The crown of the tooth is gradually worn down by the ad of maftication, and receives from this caufe, a kind of polifhed furface, which is efpecially obfervable in the canine teeth of the pig and hippopotamus. The age of the horfe is deter- mined by the appearance of the front teeth. 5 31. From the head of mammalia, we proceed to confider the trunk, according to its divifion into the three principal parts of fpine^ pelvis, and chejl. The former of thefe is the nioft conftant part of the Ikeleton; as it belongs to all red-blooded animals without exception, and is not found in a finglc white-blooded one. fertaiion on NutrU'ton, 17^ 9) 4to. of the peculiar formation of thefe vertical layers in tlie molar teeth nf the elephant, befoie they appear tJirqugh the gum ; and particularly of the man- ner, in which the enamel exudes from the bony fubftance in fmall molecuja;. ■ .39 Hence it has been o])ferved in the gUres^ th.it when the upper or lower pair of incifors fs loft, the oppofite ■teel;h grow out to a monftrous lenj'.th. A fimiiar growth takes place, when thefe animals are confined to foft food. See Moktok's Natural Hi/lory of Nnrlhumptotijiytre, p. 445.; and Achard's Chymico-phyfical Wrtimgs^ p. 161. (See note (Q^)> at the end ©f the chapter). S 32.](https://iiif.wellcomecollection.org/image/b21299298_0078.jp2/full/800%2C/0/default.jpg)
