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The Description and Use of the Sector (1624)

Gunter, Edmund · leaf 10

An illustration from The Description and Use of the Sector, 1624, leaf 10
center, and of thecircumference aiTumed by them. ThisGeometricaUinftrument hauing two legscontaining all varietie of angles, 6c thediitance of the feete, reprefentmg the fubtenfes of the circumference, is therefore called by the fame name. It containeth iz feuerall lines or fcales, of which 7 are… … vriequall parts, and numbred by x. 1.2. J. 4. 5. tf. 7. 8. 9- 10. The third, the lines of Solids, diuided into 7 000 vne-qual parts, &numbred by 1.1. 1. 2.3.4.5.6.7.8.9.10.The fourth, the lines of Sines and Chords diuided intoyo degrees, and numbred with 10.20. 50. vnto 90. Thefe foure lines o£…

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