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 (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 61
sfer 2 j to 2 m, and 3 k to 3 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 /g-,parallel to a b ; from a and 6, draw a / and 6 g-, at right anglesto a b ; divide f a, g 6, a e and e 6, each into a like number ofequal parts, as at 1, 2, 3…
Carpentry · Architecture
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.