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 378
rcles of declination will Defections hypcrbohcal!,andbe thus defcribed. Confi- And circles rfdestitution, j $ j Confider the length of the ftylc, the declination of theparallel, and the angle at the pole betwecne the fubftylarand the houre-line, whereon you meane to defcribe the pa-rallel. If you… … As in the example of the polar plane, where the length ofthe ftyle 2? C was found to be 1 inch, 61 cenr. if yon defirc toknow the diftance betweene the eequinodliall and rhe tro-pique vpon the fubftylar line: extend the compares from thetangent of 45^. vnto ihe tangent of z$gr. 30 *w. the…
Astronomy · Puritans
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