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Two-story high machine with a man standing on each level.

Iron-ore mill rock crushers, about 1890

There were enormous problems involved in getting the machinery at Ogdensberg to operate efficiently, but by 1898 most of them had been solved. Unfortunately, the price of iron had dropped to the point where there was no prospect of the plant being profitable and in 1898 the operation was shut down. Close to $3 million had been invested in the process, over $2 million by Edison himself. But, as he later is reported to have said, "we had a hell of a good time."

SI negative #87-1621

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The Challenge of Success
Before Forty
Changes At Forty
Home Life
The New Technical World
Fame And Its Distractions
Edison In His Eighties