Chapman, Allan. <br/><br/>
Dividing the circle :  the development of critical angular measurement in astronomy 1500-1850 / 
Allan Chapman. 
 - 2nd ed. 
 - Chichester :  John Wiley & Sons,  1995. 
 - 215 p., [40] p. of plates :  ill., ports. ;  25 cm. 
 - Wiley-Praxis series in astronomy and astrophysics. .
<br/><br/> Previous ed.: Great Britain : Horwood, 1990.  Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0471961698 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spherical astronomy--History.<br/>Angles (Geometry)--Measurement--History.<br/>Coordinates--Measurement--History.<br/>Astronomical instruments--History.<br/>Astronomers.
<br/><br/><label>Subjects--Index Terms: </label>Astronomical equipment  History.