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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 39

An illustration from 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, leaf 39
{Fig. 38,) and bisect it Avith the perpendicular, c d ; bisect c dwith the line, e f, as at g ; then g is the centre as was required. … 81, a.—A second method. Upon any two points in the cir-cumference nearly opposite, as a and h. {F\s:. 39,) describe arcscutting each other at c and d: take any other two points, as eand/, and describe arcs intersecting as at g and h ; join g and A,and c and d; the intersection, o, is the centre.…

Carpentry · Architecture

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