Howse, Derek, <br/><br/>
The Tompion clocks at Greenwich and the dead-beat escapement / 
by Derek Howse ; with an appendix by Beresford Hutchinson. 
 - pages 18-34, 114-133 :  illustrations, plans, portraits ;  25 cm 
<br/><br/> Cover title.  Reprinted from Antiquarian horology, December, 1970, and March, 1971. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical clocks--England--Greenwich.<br/>Clocks and watches--Escapements.
<br/><br/><label>Subjects--Index Terms: </label>Tompion dead beat escapement