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 142
and the Diameter may be allcut forth.- and the back fide ofthe Iongfquare mav be filledwith 6 lines of chords, or fcales of feverail p^rts in theinch, So may the meridian be divided by the parts ofthe fide E7),the angles of each Runb may readily be pricked downeby the degrees in the Semicircle, and… … Place the figure page n<5 of the Sefor: » 1 fhe ufe of the Meridi an line. I \ 7 In failing by the compaffe, the courfe holds fometimcupon a great circle^ fomerime upon a parallel to the seqiutor;butnioft comnonly up>i crooked lines winding towardsone of the poles, which lines are well knowne…
Astronomy · Puritans
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