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 73
that i$,to the whofeline of Sines on the S*#0>sthereneeds no farther worlce, but to take the other lines alfo oneof the fide of the Seftor. Batifit be either greater or lefler,then let it be madea parallell Radius, by applying it ouer inthe lines of Sines t betweene 90 and 90; fo the parallell… … B Let %A*Bt A *B reprefent the lines offines on the S*#w,and fct&B> the diftancc betweene ?o and $0, be equall to the / j - - &w&i Thgenerall vft 0/Skies And Tangenfs] $ 3 given radius A £. Here the lines A 40., e^ 50, A 90,may becalled the later-allfines of 40, 50,8c 90; in regard…
Astronomy · Puritans
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