On the Origin of Clockwork, Perpetual Motion Devices, and the Compass

The Project Gutenberg EBook of On the Origin of Clockwork, Perpetual Motion Devices, and the Compass, by Derek J. de Solla Price This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net Title: On the Origin of Clockwork, Perpetual Motion Devices, and the Compass Author: Derek J. de Solla Price Release Date: September 16, 2009 [EBook #30001] Language: English Character set encoding: UTF-8 *** START OF THIS PROJECT GUTENBERG EBOOK ON THE ORIGIN OF CLOCKWORK *** Produced by Chris Curnow, Turgut Dincer, Joseph Cooper and the Online Distributed Proofreading Team at http://www.pgdp.net.   Transcriber's note: The original three column Chronological Table has been replaced by a single column table with the same chronological order to make its reading easier at all browser settings.   81Contributions from The Museum of History and Technology: Paper 6 On the Origin of Clockwork, Perpetual Motion Devices, and the Compass Derek J. de Solla Price POWER AND MOTION GEARING 83 MECHANICAL CLOCKS 84 PERPETUAL MOTION AND THE CLOCK BEFORE DE DONDI 108 THE MAGNETIC COMPASS AS A FELLOW-TRAVELER FROM CHINA 110 82 ON THE ORIGIN OF CLOCKWORK, PERPETUAL MOTION DEVICES AND THE COMPASS By Derek J. de Solla Price Ancestor of the mechanical clock has been thought by some to be the sundial.