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The Description and Use of the Sector (1624)

Gunter, Edmund · leaf 15

An illustration from The Description and Use of the Sector, 1624, leaf 15
cribe a circle and diuide it into 4equall parts € KB .£>, drawing the crolfe diameters CB,ED.Then diuide the femidiameter A C,firft into to equallparts, and betweenc the whole line A D & A F the tenthpart of A C,feeke out two meane proportionall lines AIand A H. againe betweene A D and A G… … Secondly, diuide each tenth part of the liitfc A C intoto more, and betweehe the whole line A Z>, and each ofthem, feeke out two meane proportionalls as before: Soft all the line AB bediuided now into an hundred vn-cquall parts. Thirdly, If the length will beare it,fubdiuide the linerA C once…

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