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 545
encil, as at K, against the cord. Thus held, as thesquare is moved the pencil will describe the curve. Thatthis operation will produce the true curve we have but to 502 THE PARABOLA. consider that at all points the line FK will equal KJ, whichis the law of the curve (Art. 460). 468.—Parabola :… … Fig. 309. PO; make A B equal to twice N 0\ take G, any point in theaxis A O, and bisect B G in J \ on y as a centre describe thesemi-circle B CG cutting A Z, a perpendicular to B O in C;on A C and A G complete the, rectangle A CD G. Then D isa point in the curve. Take H, another point in the…
Carpentry · Architecture · Building
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
