ameline of meridians t according to the latitudes of the places, and{ct the one foote.in the terme of the former difference, tur-ning the other foote to the other perpendicular line. wefhall finde that it will erode k about 5 gr.\ from the center;which is the difference of longitude required. But… … If the fquare be giuen take his fide,and to it open the Jir-&oryin the points at J£j fo the parallel] taken from betwecnethe points ac S, (hall be the Semidiametcr of the circle requi-red. Let the Semidiameter of the circle giuen be A B,thc fideof the fquare equallvnto itfhall be found to be…
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