The carpenter's new guide: being a complete book of lines for carpentry and joinery. Treating fully on practical geometry, soffits, brick and plaster groins ... with a great variety of designs for roofs, trussed girders ... with many other things entirely new: the whole founded on true geometrical principles; the theory and practice well explained and fully exemplified on eighty-four copper-plates; including some observations and calculations on the strength of timber (1830)
Nicholson, Peter, 1765-1844 · Philadelphia, J. Grigg · leaf 106
he front rib ; putthe foot of your compass in the centre at c, draw the circular lines from a, g, /, e, d, to theline m n, and make cs eqnal to u t, that is, make the distance from the middle of the chordline mnto s, the centre of the arch at C, equal to the distance from the middle of the chordat… … i - / 7/; :: ^■•--■ • -l^ *i/ ■ 1 ■ • ^y
Carpentry
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