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 fortifcation : and some questions in navigation added by Mr. Henry Bond ... : to which is added, the description and use of another sector and quadrant, both of them invented by Mr. Sam. Foster ..., furnished with more lines, and differing from those of Mr. Gunters both in form and manner of working. -- (1673)
Gunter, Edmund, 1581-1626 · London : Printed by A.C. for Francis Eglesfield ... · leaf 63
— —§ the Vfe of the Lines of Saperficies: eS perficiese s Pon An as the Diameter, prick … 6 0.0, nhs Cre. _ Or, you may begin your work from nh, which (becaufe ic is the fixth Perpendicular ) take from nto h, the Point affumed, and {ec that length in the Line of Superficies from .6 to 6, {fo may you rick down the other Points correfpondently. | Through thefe Points h, 4, ps g» with an…
Mathematical instruments · Logarithms · Sundials · Navigation -- Early works to 1800
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
