Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 275
The same method, for finding the major and foci for the out-sidecurve, is shown in the diagram. The line drawn from h on the outsideof the joint at n, to ic, is the semi-major for the out,si(le curve; and the … Ffiser Fig. 132. Arrangement of Risers aronnil Quarter-Turn Giv-ing Tangent*; Ecjual Pitch with Connecting Flight. points where the outside pins are shown on the major will be the foci.To draw the curves of the mould according to this method, which 223 72 STAIR-BUILDING
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
