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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...and successive falling out of the temporary corner teeth, which are worn to stumps, scarcely fastened in their alveolar cavities. Sometimes one or more of the corner teeth have fallen out, and we find the inferior borders of the permanent corner teeth appearing first, more frequently in the upper jaw. The pinchers and intermediate teeth are well worn. At this period we frequently find anomalies in the eruption of the teeth. It is not rare to see the intermediate and corner teeth appear at the same time; so that an animal which is only four or four and a half years of age may have the teeth which ordinarily indicate five years. (Figs. 77, 78, 79-) Rising Five Years.--The four temporary corner teeth have fallen out and are replaced by the adult teeth. These last have not yet reached the level of the intermediate teeth and are not yet worn. The pinchers are leveled; their central enamelel, elongated from side to side, is found farther of the intermediate teeth are distinctly formed. (Figs. 80, 81, 82.) Five Years.--The mouth is complete; the incisive arch is semicircular and regular in shape; all of the permanent teeth have reached the same level. The anterior borders of the corner teeth are completely worn. The posterior are not yet worn. (Figs. 83, 84, 85.) Five Years Off.--The above characteristics are more distinct. The age has been more marked by the continual friction and amount of work to which the corner teeth have been subjected. In the superior incisive arch, the posterior borders of the corner teeth rarely commence to be worn. The profile of the incisives shows a regular one-half circle, convex from above to below. During this period, besides the causes already referred to which produce hasty or tardy eruption of the permanent teeth, other influence...