[M.11L]                                                               [M.11]	Milan.  St Ambrogio	11
[diagram]                                                             
                                                                      Vaulting.	from pier to pier is as wide as the [diagram] of the pier: 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 34l 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;  so as to appear almost a slender shaft.  note further
                                                                      		the angular portions of A, carry, bc, the vaulting, cd, a narrow
                                                                      		sub-arch run on the wall as a facing.  c d being in fact an
                                                                      		edge shaft, it is not so deep as the sub arch of B, and the
                                                                      		whole capital narrower therefore, as above by dotted  line. 
                                                                      		. The vaulting itself is so far domical or rather conical
                                                                      		for it is little curved, that the intersection of the four
                                                                      		cells is hardly perceived.

[Version 0.05: May 2008]