. Transactions . . . Series IX. is exactly like the last sulphide series {VII.) exce|)tthat the additions were pounded fine and were thrown into the ladleloose, just before the iron was poured in. In this series the sulphide was melted more quickly and formeda more perfect alloy, though a considerable amount floated ou grain and chill are shown in Fig. 2. Series IX. TestNo. Mixture. Strength. Dead-loaddeflection. Shrinkage Chill. Dead load. Impact. Square bars 614 Cupola iron and S. 392 299 .21 .144 609 .10 S. 395 282 .19 .144 .04 6
. Transactions . . . Series IX. is exactly like the last sulphide series {VII.) exce|)tthat the additions were pounded fine and were thrown into the ladleloose, just before the iron was poured in. In this series the sulphide was melted more quickly and formeda more perfect alloy, though a considerable amount floated ou grain and chill are shown in Fig. 2. Series IX. TestNo. Mixture. Strength. Dead-loaddeflection. Shrinkage Chill. Dead load. Impact. Square bars 614 Cupola iron and S. 392 299 .21 .144 609 .10 S. 395 282 .19 .144 .04 610 .30 S. 365 254 .20 .161 .03 611 .50 S. 382 237 .19 .173 .05 612 .80 S. 348 212 .17 .178 .10 613 S 312 225 .16 .177 .10 Some years ago we made in a crucible a series of test-bars usingF^M gray pig-iron ( silicon and carbon) and added a sul-phide of iron containing 22 per cent, of sulphur, which was madefor this purpose and analyzed by Harry S. Fleming. This, unlike 390 SULPHUR IN 6J4 ^,9 610 61 I 612 6)3 series YII. and IX., had no .silicon added to keep the .silicon uni-form, and therefore by the addition of iron sulphide both siliconand carbon were diluted. The tests gave the following record :Fig. 3 shows the grain of this series. Series X. TestNo. Mixture. Strength. Dead-lddefleetn. Shrinkage. Chill. Deadload. Impact. Square Flat bar. 429430431432433434435 F^M with S. .10 s. .30 S. .80 S. S. S. S. 335344364389 4224103G6 330322263212305248212 . . ., . all. all. all. all. The decrease of silicon and carbon along with the increase ofsulphur introduces a complication ; and to find out which producedthe change in strength, shrinkage, chill, etc., we made in the sameway a series for comparison with thi,s, introducing into the meltedmetal enough wire to reduce the silicon and carbon, the same as in SULPHUR IN CAST-IRON. 391 Fig. mm \P. liii
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
