[Gould, Lucius D.], b. 1814. [from old catalog] · New York, W.T. Comstock · leaf 31
jor axis inthe points 2 and 3 ; place pins in the points, and by the useof thread or cord and pencil, describe the centre curve.From the points C and S as centres, with B R as radius,describe arcs cutting each other in H ; join S H, the tan-gent ; set off each way from D equal half the width of… … STAIR BUILDING. 27 PLATE XIIJExhibits a plan of stairs zvith winders at the starting ; thecurve described from centres of unequal radii ; the wreath. in one piece. To draw the elevation of the tangents A B, B C and C D,Fig. I: Set up from step to pitch board equal four risers ; fromthe point draw…
Stair building
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