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 124
it; take the double of a c, at F, and make it the base of the board at I; take a b from F, and set it uponthe base of I, upon the middle of c c from a to b; and with the chord c c, and the height a b, describe asegment upon the bottom of the board at J; divide one-half into any number of equal… … Pla/r 37.
Carpentry
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