Eric DeLony (Author)
Only 74 cast- and wrought-iron bridges survive of the thousands built between 1840 and 1880. They were a type that spanned the gap between wood and steel. This article chronicles these irreplaceable structures that derived from both a craft tradition and scientific engineering. They were the products of country blacksmiths and "state-of-the-art" bridge works; the designs of crofters, millwrights, and mechanics—unschooled "apple-tree engineers"—and the first specialist to emerge from the engineering profession—the bridge engineer. They exemplify fundamental American values of craft, entrepreneurialism, and creativity. They helped Americans cross thousands of streams and rivers, reach new markets, and create new businesses as the frontier moved west. These artifacts of the American landscape, both urban and rural, are threatened with extinction if not saved soon.
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