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 134
fig. 160. … it cuts a perpendicular drawn from a, as at d; and that will be thecentre of the curve. In a similar manner, the centres are foundfor the mouldings ait Fig. 147, 151, 153, 156, 157, 158 and 159.The centres for the curves at Fig. 160 and 161, are found thus:bisect the line, a 6, at c; upon a, c and…
Carpentry · Architecture
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