Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 48
this axis, and c at the crossing of the axes ; place the mark a on the ex-tremity of the minor axis, and mark on the edge of the card at b the cross-ing of the axes. Revolve the card as described for the trammel, mark the posi-tions of a by points, and connect them for the curve. To construct an… … Fig. 102. 32 CONSTRUCTION OF GEOMETRICAL PROBLEMS. by the radial lines 0 e, 0/, 0 e\ Of. From the points of intersection ofthese radial lines with the semicircumference draw g h^h a^li a\ g b\ parallelto the major axis. From e,/, e,/, intersections of the radial lines with the
Mechanical drawing
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