 ... clearly the dentistry of the tribe, that we extract his account : — " The rat has formidable weapons in the shape of four small, long, and very sharp teeth, two of which are in the upper and two in the lower jaw. These are formed in the shape of...  Curiosities of Natural History - Page 88de Francis Trevelyan Buckland - 1865 - 362 pagesAffichage du livre entier - À propos de ce livre
 | 1857 - 640 pages
...the lower jaw. These are formed in the shape of a wedge, and by the following wonderful provision of nature have always a fine, sharp, cutting edge. On...glass-like enamel, which is excessively hard. The upper teeth work exactly into the under, so that tire centres of the opposed teeth meet exactly in... | |
 | William Gifford, Sir John Taylor Coleridge, John Gibson Lockhart, Whitwell Elwin, William Macpherson, William Smith, Sir John Murray (IV), Rowland Edmund Prothero (Baron Ernle) - 1857 - 612 pages
...the lower jaw. These are formed in the shape of a wedge, and by the following wonderful provision of nature have always a fine, sharp, cutting edge. On...outside is composed of a glass-like enamel, which i* excessively hard. The upper teeth work exactly into the under, so that the centres of the opposed... | |
 | 1858 - 836 pages
...the lower jaw. These are formed in the shape of a wedge, and by the following wonderful provision of nature have always a fine, sharp, cutting edge. On...glass-like enamel, which is excessively hard. The upper teeth work exactly into the under, so that the centres of the opposed teeth meet exactly in the... | |
 | Francis Trevelyan Buckland - 1859 - 434 pages
...formed in the shape of a wedge, and by the following wonderful provision of Nature, have always ji fine sharp cutting edge. On examining them carefully,...the inner part is of a soft, ivory-like composition, tvhich may be easily worn .'i way, whereas tli3 outside is composed of a glassl.ke enamel, which is... | |
 | Andrew Wynter - 1860 - 554 pages
...the lower jaw. These are formed in the shape of a wedge, and by the following wonderful provision of nature have always a fine, sharp, cutting edge. On...glass-like enamel, which is excessively hard. The upper teeth work exactly into the under, so that the centres of the opposed teeth meet exactly in the... | |
 | James Johonnot - 1885 - 268 pages
...examining them we find that the inner part is of an ivory-like substance, which is easily worn away, while the outside is composed of a glass-like enamel, which is excessively hard. The upper teeth work exactly into the under, in the act of gnawing, so that the soft part is continually... | |
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