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The Description and Use of the Sector (1624)

Gunter, Edmund · leaf 332

An illustration from The Description and Use of the Sector, 1624, leaf 332
ks,fhall be the lines belonging to the diur-nall arkes, and the fcuerall diftances betweene them andthe point C giue the like diftances betweene the center andthe parallels of the length of the day vpon the houre-linesin your plane* Or comparing thefe angles of declination with the anglesat the… … fliall giue-you the points of interferon, by which you maydraw the parallels of the length of the day,whercof you haueanother example in the diagram belonging to an horizontalplane,/><*£. 105. And by the fame reafon you may draw theparallels of thofe circles to which the Sunne is vertically…

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