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 130
f Fig. 136. Fig. 137. … Fig. 138. Fig. 139. elliptical, a b and b c being given tangents to the curve; parallelto which, the semi-conjugate diameters, a d and d c, are drawn.In Fig. 132 and 133, the lines, a d and d c, are semi-axes, thetangents, a b and 6 c, being at right angles to each other. Todraw the curve, see Art.…
Carpentry · Architecture
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