Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 247
the length of the steps, and i m equal to 18 inches, and de-scribe the arcs, 5 t and u 6, parallel to mp; from t, draw t w, tend-ing to the centre of the cylinder ; from 6, and on the line, 6 us;, runoff the regular tread, as at 5, 4, 3, 2, 1 and v ; make u x equal tohalf the arc, u 6, and make the… … Fig. 283. from a, draw c^ s, parallel to n o, and equal to one tread; from s,through 0, draw s b^. Then from w, draw w c, at right angles to n o, and set up, onthe line, w c, the same number of risers that the floor, A, is abovethe first winder, B, as at 1, 2, 3, 4, 5 and 6; through 5, (on thearc,…
Carpentry · Architecture
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