[Gould, Lucius D.], b. 1814. [from old catalog] · New York, W.T. Comstock · leaf 77
nt L as acentre, with L P, Fig. 2, as a radius, describe an arc cuttingthe curve in R ; draw R J equal L S, Fig. 2, and L J equalF H, Fig. I ; set off each way from C equal half the widthof rail ; from the points describe the outside and insidecurves. To find the angles to bevel the plank for the… … STAIR BUILDING. 73 PLATE XXXIV Exhibits the elliptical staircase continued to the starting ofsecond flight. To find the common pitch : Extend C A to D ; set upfrom A to B equal three and one-half risers ; join B D thepitch required ; draw D E tangent to the curve R E, F Rtangent to the curve A R, F…
Stair building
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