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Trigonometrie: or, The doctrine of triangles
divided into two books. The first shewing the mensuration of right lined triangles: the second of spherical, with the grounds and demonstrations thereof. Both performed by that late and excellent invention of logarithms, after a more easie and compendious manner, than hath been formerly taught. Whereunto is annexed (chiefly for the use of seamen) a treatise of the application thereof, in the three principal kinds of sailing. With exact tables of the suns declination, newly calculated: and tables of the right ascension and declination of some eminent fixed stars, with the true times of the coming to the meridian at four of the clock in the morning, fitted for the present season, and may serve for many years without any alteration. Also other necessary tables used in navigation. By Richard Norwood, reader of the mathematicks -
The seaman's companion
being a plain guide to the understanding of arithmetick, geometry, trigonometry, navigation, and astronomy. Applied chiefly to navigation: and furnished with a table of meridional parts, to every third minute: with excellent and easie ways of keeping a reckoning at sea, never in print before. Also, a catalogue of the longitude and latitude of the principal places in the world with other useful things. The third edition corrected and amended. By Matthew Norwood, mariner