The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 353
is the same as that of the first, whicl. is here and is gene-rally the case, the face-mould for the lower twist will, when re-versed, do for the upper flight: that part of the rail, therefore,which passes from e to c and from c to /, is all that will need ex-planation. Suppose, then, that the… … Fig. 294 be revolved on e c as an axis, in the manner indicated by the arcs,o n and a x, until it coincides with the plane, e r t c ; the line, ao, will then be represented by the line, x n ; then add the paral-lelogram, x r t w, and the triangle, c tl, deducting the triangle, e r s:and the edges…
Carpentry · Architecture
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