Contributions 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 S3 



MECHANICAL CLOCKS 84 



MECHANIZED ASTRONOMICAL MODELS 88 



PFRPETUAL motion AND THE CLOCK BEFORE DE DONDl 108 



THE MAGNETIC COMPASS AS A KELLO. -TRAVELER FROM CHINA UO 



81 



