The line of proportion or numbers, commonly called Gunter's line, made easie
Subtitle: by the which may be measured all manner of superficies and solids, as board, glass, pavement, timber, stone, &c : also how to perform the same by a line of equal parts, drawn from the centre of a two-foot rule : whereunto is added the use of the line of proportion improved, whereby all manner of superficies and solids may both exactly and speedily be measured without the help of pen or compasses, by inspection, looking only upon the ruler
By: by William Leybourn
Publisher: Printed for Hannah Savvbridge at the Bible on Ludgate-Hill
Published: 1684
Place of publication: London
Language: eng
Number of pages: 153
Subjects: Mathematical instruments; Early works to 1800; Slide-rule
Notes: Signatures: A-G¹² H⁶.

"Licenced, Novem. 9, 1666." The first ed. was pub. in 1667, by G. Sawbridge.

With this is bound: The line of proportion, commonly called Gunter's line, made easie. A second part ... By Wil. Leybourn. London, 1677.

English short title catalogue (ESTC), R15028