[Gould, Lucius D.], b. 1814. [from old catalog] · New York, W.T. Comstock · leaf 75
Fig.I ; from the point N as a centre, with S R, Fig. i, as aradius, describe arcs cutting the major axis in 2 and 3 ; withpins in the points, describe the centre curve ; set off eachway from N equal half the v/idth of rail ; from the pointsdescribe the outside and inside curves. To find the angle… … STAIR BUILDING. 71 PLATE XXXIII. PLATE XXXII CONTINUED. To draw the elevation of the tangent L F : Square upfrom L to B equal three and one-half risers ; join D B the■common pitch ; set up from L to R equal two and one-halfrisers, plus the rise of the rail from the riser to the point tobore for the…
Stair building
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