The mariner's new calendar. Containing the principles of arithmetic and practical geometry; with the extraction of the square and cube roots: also rules for finding the prime, epact, moon's age, time of high-water, with tables for the same. Together with exact tables of the sun's place, declination, and right-ascension: of the right ascension and declination of the principal fixed stars: of the latitude and longitude of places: a large table of difference of latitude and departure, for the exact working a traverse. Also the description and use of the sea-quadrant, fore-staff and nocturnal: necessary problems in plane-sailing and astronomy, wrought by the logarithms, and by Gunter's scale: a tide table: the courses and distances on the coast

London, printed for J. Mount and T. Page, 1768. 4:o. 136 pp. With several small woodcut illustrations and larger woodcut illustrations on p. 20 and 63-64. Contemporary light brown calf, slightly worn, with sparingly blind-stamped covers. Blue sprinkled edges. Leather scraped off at head of spine, front joint starting at top, a few minor scratches. A nice copy with small bookplate of Anders Persson in Västerås on front pastedown.A large number of editions printed between 1676 and 1785 can be found in ESTC, although not this one. Verso of half title with a publisher's catalogue: "Books of navigation, sea charts, &c. printed for J. Mount and T. Page on Tower-hill". On pp. 89-136, with a new title leaf: "A large and useful table of difference of latitude and departure in minutes and thenths parts, to every degree and quarter point of the compass, for the exact working of a traverse". A popular guide for navigating at sea.