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 338
ppofe that in our latitude of 51 jjr. 30 m. northward the declination the defcrtftUn ifthe fmre-tims] 14$ declination of an vpright plane vide *P*g. 114. tin. iq. Io the triangle PRZ we know the angle at R to be a rightangle, and the angle at Z, for it is the complement of the de-clination, and the… … As the line of the fatim.deis 10 the fine of 90£r. 00 144 ^ defirsfth n of the hmb° lints in Sp the tangent of the declination to the tangent of inclin ation of meridian. Thus in our former example I extend the compares from |the fine of the latitude 5i£>\ ^ow.vrito the fine of 90 gr*the fame…
Astronomy · Puritans
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