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COMPARATIVE FUSIBILITY OF FOUNDRY METALS. 337
from which the gray and chilled metals, as they came down, were both run into sand moulds. Heat No. 19 is a No. 2 Foundry all-coke iron which was also run into sand and chill moulds. Heat No. 20 is made from
Combined Carbon, 3.90. Graphite Carbon, 0.16.
FIG. 62.—CHILLED ROLL.
the sand and chill rolls obtained from the nineteenth heat, both of which metals were run into sand moulds as heats Nos. 10, 16, and 18. Analyses of the gray and chill roll remelts, that were poured into sand moulds to test whether chilled or grey parts of the same casting would give the softer iron, are all shown inassification of re-melts. Sand i re-mel 11 |3 CO H __ cy .73 a u S || Chill i re-mel CO u "o •"^^3 cfl OS'S Sand T re-mel t-i ^ sl