The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 58
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, (fee, draw lines, parallel to c b ; then these will divide the line, a c, in the same proportion as B is divided—as was required. This problem… … Fig. 78. 110.—Between two given right lines^ to find a mean pi o-portional. Let A and Bj {Fig. 78,) be the given lines. Ontlie line, a c, make a b equal to A, and b c equal to B ; bisect ac in e ; upon e, with e a for radius, describe the semi circle, a d 46 AMERICAN HOTJSE-CARPENTEE. c; at h,…
Carpentry · Architecture
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