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 79
Plate 21. … CRADLING TO GROINS. 33 PLATE 21/ Given one of the Body Ribs, and the Angles straight upon the Plan, and the ascent of aGroin not standing upon level Ground, to find the Form of the ascending Arches, and theAngle Ribs. Let b a c at B be the angle of the ascent, from the point b make b c…
Carpentry
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