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Notebook M p.11 Milan St Ambrogio ‘similar subarches are thrown under the Roman vaulting across the aisle; but these are narrower than the main arches; and are carried by the smaller shaft of the pier on the side of the aisle, whose semicircle a b fig 2 p 34l1 N is exactly the breadth of subarch: The relations of the whole pier to its opposite archivolt pier B, are marked in fig 2 and above in fig 1. This disposition of the vaulting and sub-arch on main pier: the breadths a and b in this figure are the a and b of fig 1 opposite where c and d are respectively the first order and cornice shaft. By comparing the section A fig 2 p 34l with the section in No 1 of the main pier, it is seen that A. is a shaft in front of pilasters; B a pilaste r in front of shafts: while the breadth a b of A being actually much less than that of the pilaster of B, is still further diminished to the eye by its curvature’
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[Version 0.05: May 2008]