Radford's cyclopedia of construction; carpentry, building and architecture. Based on the practical experience of a large staff of experts in actual constrcution work (1909)
Johnson, Alfred Sidney, 1860-, Radford, William A., 1865- · Chicago Radford Architectural Co · leaf 54
Let AC be the major, and HB theminor axis of an ellipse: lay the cross of the trammel on these lines, so that the center lines ofit may coincide with them; then adjust thesliders of the tracer, so that the distance betweenk and m may be equal to half the major axis,and the distance between 1 and m… … KO <PhK <i- 2 »i c ^ H O oa; o <; oo PRACTICAL CARPENTRY 45 major axis, and DC the minor axis of the ellipse,and FG its two foci. Take a string EFG and passit over the pins and tie the ends together, so thatwhen doubled it may be equal to the distancefrom the focus F to the end of the…
Architecture · Building
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
