The Dental cosmos . rature of this subject, Ifind that a similar view was expressed by Her-mann von Meyer* in 1852, regarding the struc-ture of the tusks of Elephas primigenius. Also Peale says, The tusks of the elephantare enveloped by a material whose fibers con-verge toward the center of the tooth, and which,although less hard than ordinary enamel, is stilla kind of enamel (vid. Cuvier, Annales du Museum). Cuvierf although casting doubt upon the accuracy of Peaks obser-vation, still remarks, It is, by the way, an observation which everyone may make on tusks whose surface has not been subjec
The Dental cosmos . rature of this subject, Ifind that a similar view was expressed by Her-mann von Meyer* in 1852, regarding the struc-ture of the tusks of Elephas primigenius. Also Peale says, The tusks of the elephantare enveloped by a material whose fibers con-verge toward the center of the tooth, and which,although less hard than ordinary enamel, is stilla kind of enamel (vid. Cuvier, Annales du Museum). Cuvierf although casting doubt upon the accuracy of Peaks obser-vation, still remarks, It is, by the way, an observation which everyone may make on tusks whose surface has not been subjected to Daubenton% writes, The girth of the circumference is some-times composed of straight transverse fibers, which, if prolonged,would meet at the center. Camper (1. a), on the other hand, says of the permanent tusks ofthe elephant, Elles ?iont point demail,1 a view which is concurred * Palaeontographica, Cassel, 1852, p. Annales du Museum, viii, 1806, p. Buffon, Histoire naturelle, xi. Fig. Fig. 4.—Cross-section ofa young permanent tuskabout two inches from thepoint, showing a thin layerof enamel between the ce-ment and ivory, a, ce-ment ; b, enamel; c, den-tine or ivory. The enamelis wanting at the left side,and both enamel and ce-ment are partially brokenaway at the right side. ANATOMY AND PATHOLOGY OF THE TUSKS OF THE ELEPHANT. 343 Fig. in by Ducrotay de Blainville.* The question of the presence orabsence of a tip of enamel on the point of the young permanent tuskof the elephant has accordingly been discussed by various writers,whereas the fact that in the now existing species of the elephant theenamel-tip is itself, at the time of eruption, coated with cement, is herefirst brought to light. The Tusk of the Adult Elephant. The permanent tusk makes its appearance soon after the deciduoustooth is shed, and, having a persistentgrowth, in the male elephant some-times attains to the enormous lengthof eight to ten feet, or in rare caseseven more, havin
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectdentist, bookyear1890
