Inside Out Library · Explore

The Description and Use of the Sector (1624)

Gunter, Edmund · leaf 159

An illustration from The Description and Use of the Sector, 1624, leaf 159
the tangent of 15 gr. being prickedJ downe in the equator on both fides from 6, fhal ierue for the■ liourcs of flue 5 andy$and the tangent of 30^r.for the houres. of 8 and 4^and the tangent of 4^r.for the houres of 3 andp;and the tangent of 60grSov the houres of 2 and 10: and thetangent of 75£r.for… … 5 To draw the home lines in 4 veriicAHdeclimagpIace. Firftjdraw AVthc meridian,and A E the horizontal line,croffing one the other at right angles in the point A. % Then The vfe of the leffer Tangent. J~\JW l Then take out AVj the fecant of the latitude of tncplace, which you may fuppofe to b^ % i…

Internet Archive · Public Domain Mark 1.0. Free to use for anything.

More pictures from The Description and Use of the Sector

More like this