A description of an accurate and simple method of adjusting Hadley's quadrant for the back observation. By Mr. Robert Blair. Published by order of the Committee of Longitude
Series: Eighteenth century -- reel 7978, no. 01.
Publisher: Peter Elmsly
Published: 1788
Place of publication: [London
Language: eng
Format: Microform
Number of pages: 20
Notes: With two leaves containing: "Works published by the Commissioners of Longitude, and sold by Peter Elmsly".

Microfilm. Woodbridge, CT Research Publications, Inc., 1986. 1 reel ; 35mm. (The Eighteenth Century ; reel 7978, no.01).