On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century

by Florian Cajori

TABLE OF CONTENTS

PAGE [I. Introduction] 187 [II. Innovations in Gunter’s Scale] 188 [Changes introduced by Edmund Wingate] 188 [Changes introduced by Milbourn] 189 [Changes introduced by Thomas Brown and John Brown] 190 [Changes introduced by William Leybourn] 192 [III. Richard Delamain’s “Grammelogia”] 192 [Different editions or impressions] 194 [Description of Delamain’s instrument of 1630] 195 [Delamain’s later designs, and directions for using his instruments] 197 [IV. Controversy between Oughtred and Delamain on the invention of the circular slide rule] 199 [V. Independence and priority of invention] 203 [VI. Oughtred’s “Gauging Line,” 1633] 206 [VII. Other seventeenth century slide rules] 207