The description and use of the sector, crosse-staffe, and other instruments : with a canon of artificiall Sines and Tangents, and the use thereof in astronomie, navigation, dialling and fortification .. (1636)
Gunter, Edmund, 1581-1626 · London : Printed by William Iones for Iames Bowler · leaf 379
them intothis sequator B D from the cen-ter B, and at the termes of thefediftances erect lines perpendicular to the equator, erodingthe lines of declination, and note them with the number ofthe houre from whence they were taken: fo thefe perpen-diculars {hall reprefent thofe hourc-lines, and the… … andantes efdeclimshn, xt $ Tcfittde the dijlance lettveene the txis andtkehiure-lwes. As the coiine of the houre from the fubftylar, is to the fine of oo£r.So thelcngth of the ftylef to the diftance between the axis and the houre-line.
Astronomy · Puritans
Internet Archive · Princeton University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-21-31.webp)
![An illustration from Cours d'architecture enseigné dans l'Academie royale d'architecture : premiere[-cinquième] partie ... (1675)](https://img.insideoutlibrary.com/img/200/ia-coursdarchitectu00blon-48-26.webp)
