white iron, in which the expansion due to heating is not sufficient to overcome the original shrinkage. Wrought iron and steel, if repeatedly heated in a similar manner, while protected from oxidation, slightly contract in cubical dimensions. The expansion in grey cast iron, caused by repeated heating, is due, in part at least, to the formation of minute spaces or cavities through which air can pass, and into which water can enter. INDEX. AIR furnace, 74, 75. Alabama blast furnace, 20. American blast furnaces, modern, 33. Ammonia from the blast furnace, 37. Analyses of Sir William Fairbairn's Analytical examination of cast iron, 56. Arrangement of blast furnace plant, 17. Arsenic in cast iron, 65. BAHLSON, on titanium in cast iron, 66. Bell, Sir Lowthian, on reduction of Blackband, 11. Blast engine, 34. ammonia in the, 37. Cleveland, 25. plant, 17. products of, 37. reactions of, 28. MACHINE moulding, 90. Machine for transverse testing, 111. Magnetites, 9. Malleable cast iron, 128. Medium iron, specifications for, 68. Melting points, 116. Micro-photographs, 121-128. Micro-structure of cast iron, 63, 121. Moulding machines, 90. dry sand, 88. loam, 89. |