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 371
176 The defertftm tfthe htnre-Unes Extend the compafles from the fine of 90 gr. vnto the fineotijgr. 16 w.ttw heghe of the pole aboue the plane, the … fame extent will reach from the tangent of tqgr. 41 m. theangle at the pole belonging to the houre of 12, vnto the tan-gent of 4^.30 m. for the arke of the plane bctwecne thefub-fMar and the houre of 1 z ; and from che tangent of 29gr 41*». vnto the tangent of 9 gr, 41 m. for the houre of 11…
Astronomy · Puritans
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