Gould, Lucius D., b. 1814. [from old catalog] · New York, A.J. Bicknell & co. · leaf 116
Plate 28 Exhibits the ground plan and elevation for a platform staircase, the risersbeyond 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. 2,…
Stair building
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