Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 278
Fig. 842.—General View of Trammel and Crossfor Setting Out Elliptical Arches. which the curve passes. The transverse ormajor axis a b, and the conjugate or minoraxis c d, being given, enclose the space bythe parallelogram eegh. Divide the linesa e, e c, each into any number of equal parts(in this… … -Method of Setting Out Ellipse withTrammel. centred arch is not an elliptical arch—it isonly an approximation. The true ellipseis obtained from an oblique section of acone or cylinder, and no portion of its curveis part of a circle ; therefore an ellipse can-not be drawn by compasses or from…
Carpentry · Joinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
