tals in growing do Fig. 8. not develop in parallel directions, but cavity, are formed of crystals more or cross at different angles, as we see in less developed, we are justified in con- Fig. 7 ; but occasionally they group into cluding that the solidification of the steel does not consist in the… … extend to the center of the ingot (Fig. contraction in an ingot of 250 kilograms. 12), and if it be of square section, the Fig. 11 represents the outline of a crys- diagonals become well marked by the tal of the group shown in Fig. 7, magni- meeting of the lines of crystals, which fied about 25…
Engineering
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