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 70
25 meafured in the line of £*«*/,would be 10$ and fuch ;s the length of the diameter required. The end of the firji Bookel THE U SECOND BOOKEOF THE SECTOR Containing the vfeof the CircuUc-Lines. * i ■ V.l Al;. I ; Of the nature of Sines > Chords, Tangents and- Secants , fit to be knowne he fore… … \ Afcmicircle therefore is an arke of iSogr. H A ojio IP ■JS Oftfawtm ofSmcsait J Tangents! A quadrant is in arke of 90 £>•. The meafureof an angle is th- arke of a circle, defcribecfout ofthe angular point, intercepted betweene the fides fu£ iiciently produced. So the meafure of a right angle…
Astronomy · Puritans
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