Sobel, Dava. <br/><br/>
The illustrated longitude / 
Dava Sobel and William J.H. Andrewes. 
 - 1st pbk. ed. 
 - New York :  Walker,  2003, c1995. 
 - 216 p. :  ill. (some col.), maps (some col.) ;  25 cm. 
<br/><br/> Originally published under title: Longitude. 1995. 
<br/><br/>Includes bibliographical references (p. 214) and index. 
<br/><br/> Describes the forty-year effort of John Harrison to invent the chronometer, the first instrument able to keep accurate time for navigational purposes. 
<br/><br/><label>ISBN: </label>0802775934 : PAP  $28.00 9780802775931 
<br/><br/><label>Source: </label> St Martins Pr, C/O Mps 16365 James Madison Hwy Us RT 15, Gordonsville, VA, USA, 22942 SAN 631-5011 
<br/><br/><label>LCCN: </label>BL2003016280 
<br/><br/><label>Subjects--Personal Names: </label><br/>Harrison, John, 1693-1776. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Longitude--Measurement--History.<br/>Chronometers--History.<br/>Clock and watch makers--Great Britain--Biography.
<br/><br/><label>LC Class. No.: </label>QB225  / .S63 2003 
<br/><br/><label>Dewey Class. No.: </label>526/.62/09