Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 249
he face-moulds. The moulds for the twistsof this stairs may be obtained as at Art. 380 ; but, as the falhng-mould in its course departs considerably from a straight line, itwould, according to that method, require a very thick plank forthe rail, and consequently cause a great waste of stuff. In… … Fiff. 284. Case 1.— When the middle height is above a line joiningthe other two. Having found at Fig. 283 the direction of thejoint, w s^ and p e, according to Art. 380, make k p e a, (Fig.284,) equal to k^ p^ e p in Fig. 283 ; join b and c, and from o,draw 0 h, at right angles to 6 c ; obtain the…
Carpentry · Architecture
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