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 106
e line a c,that is, the base of the bracket at I; draw the ordinates of I at right angles to its base;then the bracket at J, being pricked from H, as may be seen by the figures, will be theform of the angle rib required. Note. The angle rib must be ranged either externally or internally, according… … Flak. 32. Fin. A,
Carpentry
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