Wallis, Frank Edwin, 1862-1929 · New York & London. Harper & Bros · leaf 70
A-B-C OF ARCHITECTURE of its structural peculiarity. It can never remain stable when supporting a superim- posed load, without having its natural and necessary side support or buttress, since … there always occurs a side push or thrust when loads or weights are imposed upon it. Therefore we must regard arches, vaults, piers, and buttresses as typical of the Gothic, and essential in its design composition. 58
Architecture
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