20						11
                                                                                MILAN  ST AMBROZIO
                                                                      Vaulting.		from pier to pier is as wide as the        of the
                                                                      pier: similar sub-arches 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 34 1 N is exactly the
                                                                      breadth of sub-arch.  The relations of the whole pier
                                                                      to its opposite archivolt pier B are marked in fig 2
                                                                      and anove in fig 1 this disposition of the vaulting
                                                                      and sub-arch on main pier:  the breadtns a and b
                                                                      in this figure are the a and b of fig 1 opposite
                                                                      when c and d are respectively the first order and
                                                                      cornice shaft.  By comparing the section A fig 2 - p 34 1
                                                                      with the section in No 1 of the main pier, it is seen
                                                                      that A. is a shaft in front of pilasters:  B a pilatste r
                                                                      in front of shafts:  while the breadth a b of A
                                                                      being still further dimishiehd 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 a edge shaft, it is no
                                                                      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]