Page from the table of contents of Robert Recorde's The Grounde of Artes (1543) in which is outlined the first dialogue. This dialogue deals with some of the elements of arithmetic, including the basic operations and the use of the rule of three (or the Golden rule).
From the Rare Book and Manuscript Collection at Columbia University.
Part of the Mathematical Treasures section of Loci: Convergence.
Go to the photo pageFrank Swetz, Victor Katz, "The Grounde of Artes by Robert Recorde," Convergence (November 2008)