A Discourse concerning the Methods of Approximation in the Extraction of Surd Roots. By John Wallis, S. T. D. and Savilian Professor of Geometry at Oxford

J. Wallis
1695 Philosophical Transactions of the Royal Society of London  
doi:10.1098/rstl.1695.0002 fatcat:fgdmaafymnbzxodu2mp7q72d5q