A HISTORY OF EDISON'S WEST ORANGE LABORATORY 1887-1931

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expected cut costs by exploiting the rich ores the newly discovered Mesabi range of Minnesota. the other hand, Edison confidently expected that could deliver ore the eastern blast furnaces cheaper than ore from the midwest, and that the low price his output would enable the eastern furnaces compete with Carnegie's steel mills. Here was passed through Edison's "three high" rolls which produced finer powder out of the crushed ore which could then separated hundreds of successively more powerful magnets. Carnegie's strategy was based the proximity the ore beds his mills the Great Lakes. Edison thought he could produce ore cheaper processing more it. The rock passed through several sets rolls until was graded finely enough dried and then taken the separation phase. (See Sidebar "Edison and the Boys Work. These machines were designed the West Orange laboratory and were probably the largest ever built, each weighing thirty-five tons.VI-24 was done giant cornish rolls which crushed the rocks they fell between them. The great work building the Ogden plant continued . Similarly, Andrew Carnegie and Henry Frick were confident that their giant steel works (another trademark the Second Industrial Revolution) would drive down costs integrating all steps of steel manufacture into one large organization.") This operation fine example the nineteenth century confidence economies scale