The description and use of a portable instrument, vulgarly known by the name of Gunter's quadrant
Subtitle: By which is perform'd most propositions in astronomy; ... To which is added, the use of Nepiar's bones ... By William Leybourn. The third edition, with the addition of the use of Gunter's quadrant in taking the declination of a plain ... By Charles Leadbetter.
Publisher: printed for J. Wilcox
Published: 1732
Place of publication: London
Language: eng
Format: Microform
Number of pages: 81
Notes: 'The art of numbring by speaking-rods, vulgarly termed Nepier's bones' has separate pagination, and titlepage dated 1732; the register is continuous.

Microfilm. Woodbridge, CT Research Publications, Inc., 1986. 1 reel ; 35mm. (The Eighteenth Century ; reel 3948, no. 09).