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 57
B, with all its divisions, as at 1,2, 3, &c.; from a, draw a c, at any angle with a b ; make a c equal to A ; join c and b ; from the points, 1, 2, 3, &c., draw lines, parallel Xo c b ; then these will divide the line, a c, in the same proportion as B is divided—as was required. This… … 110.—Between two given right lines, to find a mean pro-portional. Let A and /?, [Fig. 78,) be the given lines. Onthe line, a c, make a b eqwul to A, and b c equal to B ; bisect ac me ; upon e, with e a for radius, describe the semi-circle, a d PRACTICAL GEOMETRY. 41 c ; at 6, erect b d, at right…
Carpentry · Architecture
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