Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 59
nsfer 2 j to 2 m, and 3 kto3 n; throughthe points, a, n, m, I and c, trace a curve, and the ellipsis willbe completed. The greater the number of divisions on a e, &c., in this andthe following problem, the more points in the curve can be found,and the more accurate the curve can be traced. If… … 118.—To describe an ellipsis by intersection of lines. Let PRACTICAL GEOMETRY. 45 a b and c d, {Fig. 83,) be given axes. Through c, draw f g,parallel to ah ; from a and 6, draw a / and h g, at right anglesto ab ; divide f a, g b, ae and e 6, each into a like number ofequal parts, as at 1, 2, 3 and…
Carpentry · Architecture
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