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 38
e segment is found, anddrawn with a compass, the difference will hardly be visible, and the flatter the segment,this difference will become the more imperceptible; but if the height exceeds one-tenthof its length, the difference will be visible; for then the arch will be quicker at the ver-tex, and… … ft s Fig. D.
Carpentry
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