Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 640
last class were, by slow de-grees, made to take the undu-lating form which belongs tothis class. Fig. 8, will showthe probable origin of thisstyle. In the first division ofit, the tracery and mullionswere of the simplest kind,and seldom exceeded a hollow or splay and fil-let, both inside and…
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