HOLIDAY SALE! Through December 31, use code PENN-HOLIDAY25 to save 40% on available titles!
(Please note that the three-volume set of Greater Philadelphia is excluded, although the individual volumes are eligible for the discount.)
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E. R. Truitt
E. R. Truitt is Associate Professor in the Department of the History and Sociology of Science at the University of Pennsylvania. She is author of Medieval Robots:Mechanism, Magic, Nature, and Art and Necessary Inventions: Roger Bacon, the Middle Ages, and the Making of Modern Science, both of which are available from the University of Pennsylvania Press.