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 67
Fig. 87. 121.— To draw an oval in the proportion, seven by nine.Let c rf, (Fig. 87,) be the given conjugate axis. Bisect c d in o,and through o, draw a 6, at right angles to c d ; bisect c o in e ,upon o, with o e for radius, describe the circle, e f g h ; from e,through h and/, draw e j and e i ;…
Carpentry · Architecture
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