Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 687
rfaces of the buttressesare ornamented with niches, as in Fig. 1634. In the Perpen-dicular style the outer surface is often partially or wholly cov-ered with panel-work tracery (Fig. 1635). The buttress was a constructive expedient to resist thethrust of vaulting; but to resist the thrust of the…
Mechanical drawing
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