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Nail chronology aid dating old buildings

Also in Sweden in the early 1700s Christopher Polhem produced a nail cutting machine as part of his automated factory.

These nails were known as cut nails or square nails because of their roughly rectangular cross section.

In the United States, in 1892 more steel-wire nails were produced than cut nails.

These crafts people used a heated square iron rod that they forged before they hammered the sides which formed a point.

After reheating and cutting off, the blacksmith or nailor inserted the hot nail into an opening and hammered it.

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Thomas Jefferson wrote in a letter: "In our private pursuits it is a great advantage that every honest employment is deemed honorable.