uppofe the length of the ftyle aboue the plane to be10 inches, and that it were required to fmde the iemidiame-terof thetropique^whofe declination isknowne to be i$gr*30 mi extend the compares from the tangent of 45^* vntothe tangent of 66gr9^o m, the fame extent will reach in theline of numbers… … 15gr. then 37.325 if 10^r. then 56.715 ifjgr. then H4.305and fo in the reft. Or if it were required to proportion the ftyle to theplane, As the tangent of 45^. to the tangent of the declination:So the femidiameter of the plane, to the length of the ftyle. As if the femidiameter…
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