Gould, Lucius D., b. 1814. [from old catalog] · New York, A.J. Bicknell & co. · leaf 98
, at B. The mould for the wreath that connects with the level rail, is shown at Fig.4; draw the major axis, D B, equal to L D, Fig. 2; square up from D to C,equal to C A, Fig. 1; set off each way from C half the width of the rail;from the points draw the dotted lines parallel to C B, for the width… … Plate 24 Exhibits the ground plan and elevation, for a staircase, with a quarter circle ofwinders at the landing. To find the major axis, of the elliptic curve for the centre of the mould,draw lines from the points, J and L, Fig. 1, parallel to B C, indefinitely; setup from J to P, equal to R S,…
Stair building
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