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 206
CHAP:t ? he ufe if the lines ofChe-rdsl n CHAP. IIII. The ufe of the lines ofecjuall parts ioynedy>itb the lines of Chords. THc lines of equall parts doe feme alfo for protra&ion, asmay appeareby the former Diagrams^ but being ioyriedwith the lines of Chords, which I place upon one fide of… … Let the diftance required be *A *B. At ^thefirftftationrmake choife of a ftation line toward C, and obferue the angle& AC by the tangent lines, which may be 4$ gr. zo m ; then Bb 5 having 14 Tbf ufi tf th I***5 *f Chords. having gon an hundred paces toward £ I make my fccondftation at Dj where…
Astronomy · Puritans
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