The American house carpenter. A treatise on the art of building. Comprising styles of architecture, strength of materials, and the theory and practice of the construction of floors, framed girders, roof trusses, rolled-iron beams, tubular-iron girders, cast-iron girders, stairs, doors, windows, mouldings, and cornices; together with a compend of mathematics. A manual for the practical use of architects, carpenters, stair-builders, and others (1880)
Hatfield, R. G. (Robert Griffith), 1815-1879, Hatfield, O. P., ed · New York, J. Wiley & sons · leaf 499
d FB each half a side, while EDis the radius of the circumscribed circle, and JD the radiusof the inscribed circle of the octagon. Draw the diagonalA D ; with D F ior radius, describe the circumscribed circleEGF, join G Avith F and with E; then E G and G F W\\\each be a side of a regular… … C D Fig. 292. Comparing the two homologous (ArL 361) triangles, G^Fand FHD {Art. 374), we have— GJ . GF .: HF : FD, n \ b -.. - . R, n = 2R n = 4R- Putting this value of ;/in an equation against the formervalue, we have— ^■•-& In Art. 436, the value of F D, as the radius of the cir-cumscribed…
Carpentry · Architecture · Building
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