Three volumes on sea navigation, bound together, by cartographer <a href="https://www.sothebys.com/en/search?query=Samuel%20Dunn&amp;tab=objects&amp;sortBy=bsp_dotcom_prod_en" rel="noopener noreferrer" target="_blank">Samuel Dunn</a>.<ul><li>Samuel Dunn (English).</li><li>The Theory And Practice Of The Longitude At Sea; [bound With] A New And Easy Method Of Finding The Latitude On Sea Or Land, Having To Altitudes Of The Sun And The Time Elapsed Between The Two Observations, Measured By A Watch Or Other Time-keeper.; [bound With] An Introduction To Latitude, Without Meridian Altitudes; And Longitude At Sea; Having Cotemporary [sic] Observations: With Astronomical Delineations And Nautical Formulas, Engraved On Copper Plates.</li><li>London:&nbsp;Printed for the Author and Sold by him.&nbsp;1778; 1782.&nbsp;</li><li>Octavo.</li><li>viii, 152, 20, 24 pages.</li><li>The first work, Theory and Practice, includes 8 plates (including three fold-out plates): contains plates #1-3, 6, 9, 11, 13-14, appears to be lacking plates #4-5, 7-8,10,12, and 15.</li><li>Bound in full calf, re-backed with red and green gilt-lettered spine labels.</li></ul> Three works by British cartographer, mathematician, and astronomer Samuel Dunn (1723-1794), bound together. The first two works were both published in 1778; the third in 1782.

The Theory And Practice Of The Longitude At Sea [bound With] A New And Easy Method Of Finding The Latitude On Sea Or Land [bound With] An Introduction To Latitude

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