The carpenter's new guide: being a complete book of lines for carpentry and joinery (1848)
Nicholson, Peter, 1765-1844. [from old catalog], Johnston, William, architect. [from old catalog] · Philadelphia, Grigg, Elliot and co. · leaf 85
Ihik 23.. … CRADLING TO GROINS. 35 PLATE 23. A CYLIJYDRO-CYLIJVDRIC ARCH. DEFINITION. A cylindro-cylindric arch or Welsh groin is an under pitch groin, whose side and body arches are both givensemicircles, or they may be similar segments of circles cutting through one another, whose intersections donot meet in…
Carpentry
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