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 550
pex of the curve—or, to obtain points for thispart of the curve as shown in the following article. 471.—Parabola: Dci^cribed from Diameters.— Let EC {Fig. 312) be the given base and A E the given height, placedperpendicularly to E C. Divide E C \w several parts atpleasure, and from the points of… … D C Fig. 312. the length of the diameters, and in which n equals D C {Fig.312), /equals twice E C\ and / equals half the parameter ofthe curve. The value of p is given in equation (A.), {Art,470), in which y equals EC {Fig. 312), and x equals A E.Substituting these symbols in equation (A.), we…
Carpentry · Architecture · Building
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