tangent of 45 ^r. which is alwayes equallto the Radius,(hall giue the femidiameter of 90£r; a tangentof 40^. mall giue 80 £r. in the femidiameter: a tangent of35£r./hall giue 70.&C. So that the femidiametersmay be di-uided infuch fort as the tangent on the fide of the Sector,the difference… … S^M The meridians are to be drawn e through both the polesV and S, and the degrees before graduated in the equaror.The diilancc of the center of each meridian from A the cen-ter of the plane, is cqnall to the tangent of the fame meri-dian, reckoned from the gcnerall meridian P ^£ S E^ andthe…
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