Andrew Carnegie：Autobiography of Andrew Carnegie, Additional Excerpt 275

At a most critical period when it was necessary for the credit of the firm that the blast furnace should make its best product, it had been stopped because an exceedingly rich and pure ore had been substituted for an inferior ore--an ore which did not yield more than two thirds of the quantity of iron of the other. The furnace had met with disaster because too much lime had been used to flux this exceptionally pure ironstone. The very superiority of the materials had involved us in serious losses.

Source： https://www.gutenberg.org/ebooks/17976
Locator：Additional excerpt 275 · Verified：2026-10-19 · Verification：Short excerpt

公版传记；原文逐字取自 Project Gutenberg，仅摘录段落并附全书链接。

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