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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 42

An illustration from 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, leaf 42
lines, forming the triangle, a c b ; bisect the angle, cb a, {Art. 77,) with the line, b d ; also bisect c ain e, and erect e d, perpendicular to a c, cutting b d in d ; then d is i\iQ fourth point required. A fifth point may be found, as at/, by assuming a, d and b,as the three given points, and… … 87.— To describe a segment of a circle by a sei-triaiigle.Let a b, {Fig. 46,) be the chord, and c d the height of the seg-ment. Secure two straight-edges, or rulers, in the position, c eand cf by nailing them together at c, and afiixing a brace frome to/; put in pins at a and b ; move the angular…

Carpentry · Architecture

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