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 417
rough the center and the termes oft Ik fe chords, fo the line BH (hall be the horizon, and hisperpendicular BV the axis of the horizon, and the reft thelines of altitude, according to their diftance from the ho-rizon. ^ That done, confide* your plane, which here for example Sec 3 is 222 Todrdrv the… … is the line between *B the top ofthe ftyle and V the verticallpoint, and prickethat downc in this figure from 3 vnto V\theri take out both the line VH and all the reft of the diltan-ces betwecne V the verticall point and the ieuerall pointswherein the verticall lines doe crofle the horizontal! line…
Astronomy · Puritans
Internet Archive · Princeton University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Examen dv livre des Recreations mathematiqves, & de ses problemes en geometrie mechanique, optique & catoptrique [du J. Leurechon] Où sont aussi discutées & restabiles plusieurs experiences physiques y proposées (1639)](https://img.insideoutlibrary.com/img/200/ia-examendvlivredes00mydo-364-65.webp)
![An illustration from Die Physiologie der Farben [electronic resource] : für die Zwecke der Kunstgewerbe (1866)](https://img.insideoutlibrary.com/img/200/ia-b20425363-70-0.webp)
