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138
GOTHIC ARCHITECTURE
CHAP.
(a, in A, Fig. 77) that have no functional office. With this exception they consist, respectively, of a central column surrounded by detached monolithic shafts, each one sustaining
FIG. 77.
a rib of the vaulting. These shafts are in two superposed orders—the first having their capitals at the springing of the ground-story arches, and the second having bases which