Andrew Carnegie：Autobiography of Andrew Carnegie, Additional Excerpt 335

But although this purchase was a mistake, directly considered, it proved, at a subsequent date, a source of great profit because it gave us a furnace small enough for the manufacture of spiegel and, at a later date, of ferro-manganese. We were the second firm in the United States to manufacture our own spiegel, and the first, and for years the only, firm in America that made ferro-manganese. We had been dependent upon foreigners for a supply of this indispensable article, paying as high as eighty dollars a ton for it. The manager of our blast furnaces, Mr. Julian Kennedy, is entitled to the credit of suggesting that with the ores within reach we could make ferro-manganese in our small furnace. The experiment was worth trying and the result was a great success. We were able to supply the entire American demand and prices fell from eighty to fifty dollars per ton as a consequence.

Source： https://www.gutenberg.org/ebooks/17976
Locator：Additional excerpt 335 · Verified：2026-10-19 · Verification：Short excerpt

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