Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 217
tomeet corresponding perpendiculars from eg; then those pointsof intersection will give the curve line, d g, which will be theone required for the edge of the soffit. The other edge, c A, isfound in the same manner. 355.—^ To find the form of the soffit for circular toindowheads, when the face of… … Fig. 253. c Proceed as in the foregoing article to obtain the line, d g ; thenthat will be the curve required for the edge of the soffit; theother edge being found in the same manner. If the given vertical section be taken in a line with the face ofthe wall, instead of at right angles to the face…
Carpentry · Architecture
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