THE MARINERS NEW KALENDER. Containing the Principles of Arithmetick and 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. The Problems of Plain - Sailing and Astronomy, wrought by the Logarithms, and by Gunter's Scale. A Tide Table. The Courses and Distances on the Coast of Great Britain, Ireland, France &c. And the Soundings coming into the Channel. With Directions for sailing into some Principal Harbours. London: Printed for Thomas Page, and William Mount at the Postern on Tower-Hill. Where you may have all sorts of mathematical and sea-books.
1729. Small 4to, Two parts in one, pp. 132; with separate title page for the Table of Difference of Latitude and Departure at p. 88, pp. 89-96 erroneously numbered; with a number of woodcut illustrations and diagrams; half - title with three duty stamps as required for an almanac; small very pale dampstain affecting top edge of a few pages, upper margin cropped close in places, but with no loss to running title, some occasional light soiling and staining, but otherwise good; with contemporary signature ‘Rick Sowis’ (?) and date of 1731 on old rear endpaper; An appealing copy in contemporary calf, of the very popular New Mariner's Kalendar first published by Colson in 1676. Colson’s practical and invaluable manual for mariners was to go through numerous editions until the end of the eighteenth century, but was not initially issued annually. The work was eventually revised by William Mountaine in 1753, to cope with the change from Julian to Gregorian calendars with occurred in Britain in 1752. Between pp 89-109 is found a table, which has a separate title-page outlining "A large and very useful Table of Difference of Latitude and Departure in Minutes and Tenth Parts, to every Degree and Quarter Point of the Compass, for the exact Working of a Traverse". An explanation of how to use the table then follows. For obvious reasons most copies were discarded when a new edition appeared, so that survivors, especially in nice condition, are relatively uncommon. ESTC: T216139; OCLC locates two copies of this issue at the British Library and Trinity College, Dublin.
Condition: bound in contemporary full panelled calf, neatly rebacked some time ago with raised bands and gilt lettering, with later endpapers, inner hinge strengthened with old paper, head of spine a little chipped, upper joint just starting but holding firm, covers slightly stained in places with some old abrasions, with the signature of ‘Rick Sowis’ visible in ms, written vertically in central panel of upper cover, joints and extremities lightly rubbed and bumped; a good copy.