John W. Farrell - The Clock and the Camshaft: And Other Medieval Inventions We Still Cant Live Without

MANY PEOPLE HELPED ME IN THE RESEARCHING AND WRITING OF THE book, in particular, Thony Christie; Thomas F. Glick, emeritus professor of history at Boston University; Owen Gingerich, emeritus professor of astronomy and the history of science at Harvard University; Adam Apt, PhD; Colleen Farrell, PhD; Toby Huff, PhD. I owe a special thank-you to Ryan Birmingham for providing all the original illustrations for the book, as well as to the staff of the Harry Elkins Widener Memorial Library at Harvard, who allowed me to keep several piles of books out of circulation for several months; to the editorial team at PrometheusJake Bonar, Jessica McCleary, Erin McGarvey; to Hilary Hinzmann for his editorial support, and to my agent Susan Schulman. Finally and most importantly, to my wife and daughters for their constant support.

Any errors or omissions in the book are entirely the fault of the author.

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