Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 206
Pearlite, magnified about750 diameters. Steel containing more than nine-tenths of one per cent of crystalsof pearlite, surrounded by en-velopes of cementite(Fe3.C). Magnified200 diameters. … CLEANING CARS BY THE VACUUM METHOD. OPEN HEARTH PROCESS 165 firebricks through which air or gas passes on its way to the fur-nace, and through which, at due intervals, the products of com-bustion emerge as they pass to the stack. On each side, one ofthe regenerators is for air, the other for gas;…
Inventions · Inventors
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