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 245
, | The afe of the Meridian Line. Eo ' out-of the Meridian Line, and prick it down in the Meridians from A unto M, and from Eto D, and draw the right Line M D for the Pa-- - yallel of the fecond place, and the right Line A D for the Line of di- ftance between both places: focthe Angle M AD fhall… … 5.To find the quantities of this Angle M A D,I may either make ufe- ~ of she Protraétor,or elfe of a Line of Chords,and fo lopenmy Com~ ~ paffes unto one of the Chords of 60 gr. and fetting one foot in the: Point A, withthe other I defcribe an occule Ark of a Circle, inter-: - fedting the Meridian…
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.
