Andrew Carnegie：Autobiography of Andrew Carnegie, Excerpt 66

The Siemens Gas Furnace had been used to some extent in Great Britain for heating steel and iron, but it was supposed to be too expensive. I well remember the criticisms made by older heads among the Pittsburgh manufacturers about the extravagant expenditure we were making upon these new-fangled furnaces. But in the heating of great masses of material, almost half the waste could sometimes be saved by using the new furnaces. The expenditure would have been justified, even if it had been doubled. Yet it was many years before we were followed in this new departure; and in some of those years the margin of profit was so small that the most of it was made up from the savings derived from the adoption of the improved furnaces.

Source： https://www.gutenberg.org/ebooks/17976
Locator：Chapter X, excerpt 66 · Verified：2026-10-19 · Verification：Short excerpt

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