The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 149
Fig. 152. … 1ig. 156. 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. 149 and 150, the lines, a d and d c, are semi-axes, thetangents, a b and b c, being at right angles to each other. Todraw the curve, see Art. 118. In…
Carpentry · Architecture
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