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 267
Divide two adjacent sides, as a 2 and 2 1, intoas many equal parts as there are quarters in the number of revo-lutions, as seven ; from those points of division, draw lines acrossthe square, at right angles to the lines divided; then, 1 being thefirst centre, 2, 3, 4, 5, 6 and 7, are the centres… … Fig. 299. 398.— To describe the scroll for a hand-rail over a curtailstep. Let a b, (Fig. 299,) be the given breadth. If the givennumber of revolutions, and let the relative size of the regulatingsquare to the eye be ^ of the diameter of the eye. Then, by therule, If multiplied by 4 gives 7, and 3,…
Carpentry · Architecture
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