Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 278
-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… … Fig. 843.—Enlarged Detail of End of Trammel andEod for Setting Out Elliptical Arches. will give the points in the curve for onequarter of the figure. Kepeat the operationfor the other three quarters, then bend a thinflexible rod round the points obtained, anddraw the curve. It is interesting to…
Carpentry · Joinery
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