Author: EMERSON (William):
Title: Chronology: Or, the Art of Reckoning Time. Describing the several Divisions of Time in common Use; the Nature and Original of Cycles and Periods, and the most remarkable Aera's; and the manner of Computing the Numbers of such Cycles, or the Common Notes, for any Year; the moveable Feasts; the Places of the Sun and Moon; and the Nature of the Calendar. Founded upon Astronomical Principles. To which is added, A Short Chronological Table.
Description: London: Printed for J. Nourse..., 1770. FIRST AND ONLY EDITION. 8vo, 205 x 130 mms., pp. [ii], 88, disbound. This is one of many pamphlets on arithmetical and mathematical subjects that Emerson (1701 - 1782) published with Nourse. After the introduction of the Gregorian Calendar, adopted in many Catholic countries in 1582, the measuring of time or the construal of a calendar was as much a political topic as a mathematical one. Britain and its (then) American colonies adopted the calendar in 1752, with Wednesday, 2 September 1752 followed by Thursday, 14 September 1752. Emerson's explanation of how to calculate days and months, as well as past events and future dates, was one of many, but also one of the clearest.

Keywords: chronology mathematics prose


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