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Bibliography
1. All illustrations were generated by the author using TurboCad ® Professional, Ver. 6, http://www.imsisoft.com/
2. Goodrich, Ward L., The Modern Clock, 1950, Ninth Printing, pp. 113-115. Angles of a Deadbeat Escapement”, pp. 24-25. 4. Duy Ly, Tran, Seth Thomas Clocks and Movements, Third Edition, Vol. 1, 2004, p. 142. Used with permission, http://www.arlingtonbooks.com/
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