Gould, Lucius D., b. 1814. [from old catalog] · New York, A.J. Bicknell & co. · leaf 92
e, and H J the length of curverequired. The direction of the straight wood, is found by drawing J S,equal to S G, Fig. 2, and H S, equal to H G, Fig. 2. For the width of themould, set off each way from B, half the width of the rail. The points forthe pins, to describe the outside and inside curves,… … Plate 22 Exhibits the ground plan and elevation, for a semi-circle of winders, at thetermination of the staircase ; the wreath in two pieces. To find the length of the major axis, of the elliptic curve, required for thecentre of the mould: At Fig. 1, draw lines from A and E parallel to L C :set up…
Stair building
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