The main girders rest on the revolving platform, and the ends of the bridge are circular arcs fitting the fixed roadway.
From these results the mensuration of any figure bounded by circular arcs and straight lines can be determined, e.g.
He also gave approximate rectifications of circular arcs after the manner of Huygens; and, what is very notable, he made an ingenious and, according to J.
The framework is attached to two independent circular arcs Cs and rr having their centres at 0 and provided with clamps D and A on the axis F of the instrument.
in diameter; he substituted equatorial for zodiacal armillae, thus definitively establishing the system of measurements in right ascension and declination; and improved the graduation of circular arcs by adopting the method of " transversals."