umulation of local contraction prismatic layer of the ingot, and the cavities. On the other hand, the more feeble cohesion of the prisms (Fig. 10). compact the crystals, and the more rapid The local contraction spaces distribute their growth, the more difficult does it themselves in such case… … cooling surface. The prisms have metrical with reference to the principal generally an irregular cross section, axes. first, because the lateral axes of neigh- In illustration of the preceding re- boring crystals have between them marks is presented the transverse section no definite relation;…
Engineering
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