The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 62
fer 2 j to 2 m, and 3 A: to3 w; throughthe points, a, 7^, 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 desaHbe an ellipsis by intersection of lines. 7 Lo.% 50 PRACTICAL GEOMETRY. a b and c d, {Fig. 83,) be given axes. Through c, draw / ^,parallel Xc ah ; from a and 6, draw a f and h g, at right anglesto ab ; divide f a, g b, a e and e 6, each into a like number ofequal parts, as at 1, 2. 3…
Carpentry · Architecture
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