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.

Author/creator Blair, Robert
Format Electronic
Publication Info[London] : [Peter Elmsly], [1788]
Description20, 4 unnumbered pages, plate ; 8⁰.
Supplemental ContentFull text online

General noteWith two leaves containing: "Works published by the Commissioners of Longitude, and sold by Peter Elmsly".
General noteReproduction of original from the British Library.
References English Short Title Catalog, ESTCT112545.
Reproduction noteJoyner- Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. Available via the World Wide Web. Access limited by licensing agreements

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