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The line of proportion or numbers, commonly called Gunters line, made easie
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 William Leybourn -
The works of Edmund Gunter
containing the description and use of the sector, cross-staff, bow, quadrant, and other instruments : with a canon of artificial sines and tangents to a radius of 10.00000 parts, and the logarithms from an unite to 10000 : the uses whereof are illustrated in the practice of arithmetick, geometry, astronomy, navigation, dialling, and fortification, and some questions in navigation added by Mr. Henry Bond teacher of mathematics in Ratcliff, near London : to which is added, the description and use of another sector and quadrant, both of them invented by Mr. Sam. Foster, late professor of astronomy in Gresham Colledge, London furnished with more lines, and differing from those of Mr. Gunters both in form and manner of working