Gould, Lucius D., b. 1814. [from old catalog] · New York, A.J. Bicknell & co. · leaf 118
Plate 28 Exhibits the ground plan and elevation for a platform staircase, the risersplaced beyond the cylinder. To find the length of the major axis of the elliptic curve for the centreof the mould, draw lines from D and H, Fig. 1, parallel to C J indefinitely.Set up from D to S, equal to B S, Fig.…
Stair building
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
