Mountain, William. **E.110.57 A description of the lines drawn on Gunter's
scale, as improved by John Robertson and executed by Nairne and Blunt, with their use and application, especially in navigation and astronomy. Lond. Nairne & Be. 1788. xi, 88 pp. Pls. 8°.
 
-Math. SS instruments. - Gunter's scale.
-Navigation.