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 88
nd the height of the given arch n o, and describean ellipsis; and to describe the side arches between any two piers, as from a to b, take theextent a b, and the height of the given arch,^ g, at A, and describe an ellipsis, it will givethe proper form of the rib to stand over a b; the intersecting… … o. Fi.l . 1.
Carpentry
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