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 326
~ ~~ “ago whe wfe of the Lin of ferved again, and found the fecond Angle of the Ships PofitionB DC … ‘In this and the like cafes,1 havea right Line Triangle, in which there | quired ¢o find the other is one fide and three Angles known, and it is re ‘wo fides, and the Canon for it is this ; . ie | As the Sine of an Angle oppofire to the known fide, ei isto that known fide : “So the Sine of the…
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.
