Author(s):
Frank J. Swetz (Pennsylvania State University)
Little is known of John Davison other than that he described himself as a London schoolmaster. His New System of Arithmetic, published in 1780, contains a “Geographical Table” most probably to accommodate the trade and commercial interests of its users.
Source: Oughtred Society, Archive of Collections, Tom Wyman Collection. Tom Wyman (1927-2014) was the first president of the Oughtred Society. Wyman assembled an extensive collection of early slide rules and books related to them. The image above is #113 in the Wyman Collection.
Index to Mathematical Treasures
Frank J. Swetz (Pennsylvania State University), "Mathematical Treasure: Davison's New System of Arithmetic," Convergence (June 2018)