[Gould, Lucius D.], b. 1814. [from old catalog] · New York, W.T. Comstock · leaf 21
ng the curve in D ; from the point D as a centre,with N P as a radius, describe an arc cutting the curve in C.Then D is the point of contact, and D C the length required. To find the direction of the straight rail : From the pointsD and C as centres, with B S and P S, Fig. 2, as radii,describe arcs… … STAIR BUILDING. I7 PLATE VII Exhibits a plan for turnout at the starting of a staircase. To draw the elevation of the tangents P J L, Fig. i :Square up from the riser and intersection of the tangents Land J indefinitely ; from the point D, draw the commonpitch D C ; Set up from A to B equal the…
Stair building
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