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The Description and Use of the Sector (1624)

Gunter, Edmund · leaf 80

An illustration from The Description and Use of the Sector, 1624, leaf 80
y be found in like fort bytheirinterieclions with the meridian, and the middle be-tweene thofe interfe&ions is alwayes the center. The azimuths may be drawne as the circles of longitudewere before. For the center of the firlt verticall Y Z % willbe found at / (fomewhat neare vnto £)by the… … equal!to jZ;thxk dmiflonsinaUbe the centers, r.nd thediihuce from thefc diuifions vnto Zfinll he the fmUffitib*ten whereon to defcribe the reft of the azirmuhs. For example of this proieaion, let o the place of theSutrgiuen be 10Jjr.ofb: a right line drawne from P through thkplace vnto the equator,…

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