Page 321 - My FlipBook

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Fig. 147. A ijliotuniifinyiaiih uf curled enamel in which Llic inner two-thirds of the enamel i?
composed of interlaced bundles of rods. These straijrhton up and becomo parallel in the outer one-
third of the thickness of the enamel. Such enamel splits away from the margin of a break with great
dilhcMlty as compared with enamel having parallel rods.
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