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 38
fo as it may be the Bafe of anJfofcheles triangle B A C, whofe fide A B, A C are equalto B, the line of the fecond denomination. Thea ThegtoerAllvfcoftheSeRtr, if Then the Setter being thus opened, I take C the lineof6*o,betweenethefeetcofthe compafles, and carryingthem partllell to B C,l findethem… … \ i ThegemrM vfe of the Settorl But if I would enter on the fide of the Settor, then Vt6uTdI difpofe the lines of the firii denomination A and C, inthe line of £*»<?/, on both fides of the Stttor, in A B, A C&in A D, AE,foasthey fhouldall ncete in the centerA, and then taking B the line of…
Astronomy · Puritans
Internet Archive · Princeton University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-84-59.webp)
