Author: the Mathematics, and F.R.S.,
Title: Navigation New Modelled: or, a Treatise of Geometrical, Trigonometrical, Arithmetical, Inftrumental and Practical....
Description: London, Printed by J. Mount & T Page, 1769. 9th ed. G.Navigation, teachng how to keep a Reckoning, both in latitude and longitude, without tables or instruments, by a. new method never yet published, illustrated with practical examples of keeping a Journal, and correcting it by an Obfervation, with a new way of finding the Variation, and time of High-Water at any known Port. Together with all neceffary tabales, calculated to the New Stile, and the projection of the Sphere Orthographic and Stereographic. Alfo current sailing, with other Pleafant Queftions, and how to correct the Longitude by a Solar Observation. This is the ninth edition, with the addition of Spherical Trigonometry, and Aftronomy. Old-fashioned handwriting with flourishes on endpapers. Leather, edge wear.

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