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 345
in the lower pare of the line, if it be the North face of theplane; for there the ftyle muft point vpward 5 and vpon thwcenter ldelcribe an occult circle, reprefenting the decliningvertical! belonging to the plane* 3 I find a choid of 18 gr, 8 m* thejdiftance of the fubftylarfrom the meridian of… … been in a vertical dtcUntngfUne. 1$ I been infcribed toward the left hand) and there I draw theline C A feruing for the fubftylar. 4 According to the Table of the arkes of the plane fromthe fubftylar, I find a chord of $gr* 38 »-and inferibe it intothiscirck, from the fubftylar toward the meridian,…
Astronomy · Puritans
Internet Archive · Princeton University Library · Public Domain Mark 1.0. Free to use for anything.
