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 38
and draw the chordb c for one half of the segment, and draw bm a.t right angles to 6 c; and from the point o di-vide a b each way, into five equal parts; also from c, divide cm, and en, each into five equalparts; and draw 1 1, 2 2, 3 3, 4 4, 5 5, on each side, through the divisions 1, 2, 3, 4, 3 on… … //■ .)■ /v./ JJ.
Carpentry
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