. A system of anatomy for the use of students of medicine (Volume 1). 90 COMPOSITION OF THE TEETH interval between them. All the wear of the teeth takes place,therefore, at the end of these fibres and not upon their sides;and the enamel is rendered by this arrangement much less liableto fracture. —No vessels have been traced to this substance, nor has itever been seen like the bony portion, coloured by madder inyoung animals fed on this substance during the developementof the teeth. But Mascagni, infatuated with his discoveries inthe absorbent system, absurdly regarded this substance as en-tir
. A system of anatomy for the use of students of medicine (Volume 1). 90 COMPOSITION OF THE TEETH interval between them. All the wear of the teeth takes place,therefore, at the end of these fibres and not upon their sides;and the enamel is rendered by this arrangement much less liableto fracture. —No vessels have been traced to this substance, nor has itever been seen like the bony portion, coloured by madder inyoung animals fed on this substance during the developementof the teeth. But Mascagni, infatuated with his discoveries inthe absorbent system, absurdly regarded this substance as en-tirely formed of absorbent vessels.* It is exceedingly hard andstrikes fire, on collision with steel. While covering the bone, itpresents a milky white appearance; removed from it, it is semi-transparent and opaline. —The enamel is thickest on those parts of the teeth most ex-posed to friction, as on the horizontal surfaces of the grinders,the edges of the incisors, and the points of the cuspidati. Theposition of the enamel and its arrangement into fibres is well
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