Directions for using the new improved Hadley's quadrant
Subtitle: with the new method of adjusting the glasses for the back observation. ... Made by P. and J. Dollond, ... in St. Paul's Church Yard, London.
Series: Eighteenth century -- reel 7767, no. 03.
Published: 1772
Place of publication: [London
Language: eng
Format: Microform
Number of pages: 56
Notes: Includes: 'Directions for using the Hadley's sextant to determine the longitude at sea'.

Sig.B8 (pp.30-31) is not present.

With a half-title.

Microfilm. Woodbridge, CT Research Publications, Inc., 1986. 1 reel ; 35mm. (The Eighteenth Century ; reel 7767, no.03).