Gould, Lucius D., b. 1814. [from old catalog] · New York, A.J. Bicknell & co. · leaf 88
2 and S 3, cutting the major axis at thepoints required. The bevel, for the straight wood, is shown at S; for thecentre joint, at B. The mould, for the lower wreath, is shown at Fig. 4. Draw B C, equal toS C, Fig. 1, and B A, equal to S H, Fig. 2; set off each way from C, halfthe width of the rail.… … Plate 21 Exhibits the ground plan and elevation for a quarter circle of winders and thestarting of the return flight, from the spring of the cylinder; the wreath intwo pieces. To find the major axis, of the elliptic curve for the centre of the moulds,draw lines from A and L, Fig. 1, parallel to C…
Stair building
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