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 43
amp;c. ; and a regular curve will be formed that will be tangical to the line, a b, at the point, 1, and to 6 c at 5. This is of much use in stair-building, in easing the anglesformed between the wall-string and base of the hall, also betweenthe front string and level facia, and in many other… … PRACTICAL GEOMETRY. 2T heads, window-heads, &c., to rather better advantage than Art,87. For instance, let a b, {Fig. 49,) be the width of the open-ing, and c d the height of the arc. Extend c d^ and make d eequal to t, d ; join a and e, also e and b ; and proceed as direct-ed at Arf 89.
Carpentry · Architecture
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