The carpenter's new guide: being a complete book of lines for carpentry and joinery (1850)
Nicholson, Peter, 1765-1844. [from old catalog], Johnston, William, architect. [from old catalog] · Philadelphia, Lippincott, Grambo and co. · leaf 103
CRADLING TO NICHES. 41 PLATE 29. The Plaji of a Niche in a circular Wall being given, to find the Front Rib. B is the plan given, which is a semicircle whose diameter is a b, and a, i, k, I, m, h, thefront of the circular wall; suppose the semicircle B to be turned round its diameter a b, sothat…
Carpentry
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