Wondrous Contrivances: Technology at the Threshold
By Merritt Ierley
Clarkson Potter, 2002
320 pages, $21
y. Historian Ierley does a good job putting each invention into context, with what preceded it and what it replaced. For instance, although we think of the copying machine as a 20th century invention, primitive versions were in place since the 1800s—and the early ads for the machines are fascinating.
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