The American house-carpenter : a treatise upon architecture, cornices and mouldings, framing, doors, windows, and stairs : together with the most important principles of practical geometry (1849)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 67
2 J to 2 m, and 3 A: to 3 n; through the points, a, n, m, I and c, trace a curve, and the ellipsis will be completed. The greater the number of divisions on a e, (kc, in this and the following problem, the more points in the curve can be found, and the more accurate the curve can be traced. If pins… … d Fig 83. 118. — To describe an ellipsis by intersection of lines. I^et
Carpentry · Architecture · Building
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
