87										back of 82                                                88											83   
                                                                      
                                                                      	lateral chapels daguerreotyped:  It is connected with two
                                                                      important  works:  the apse of St John and Paul:  and
                                                                      the panel mouldings of the Byzantine.
                                                                      Its main idea is that of a bridge of solid stone from
                                                                      wall to wall, with a chamfered edge to the arch: and a cor-
	Measures of No 150.                                                  nice above:  the chamfer of the arch nearly as wide as
Pure shaft from r2 to base, 5 " 0	one side of shaft 2¼ in wide        its soffit;  so falling on an octagonal abacus and an
                                                                      octagonal shaft;  the notch worked with a joint at the
r r2 vertical circa           7                                       head, and a lintel laid over;  This general consturction
                                                                      is shown opposite, now for details.
r s --- --- --- ---           1¾                                      	1st;  the lintel:  Lection x y no 150 in some of the
                                                                      arches it is x2 y2  Under it is a great gaping joint.
m n           	1 " 7¾                                                 Then, fig 2 No 150 gives a section down at apex of arch;
                                                                      from a to soffit, i.e. a long masonry joint, and b along
m m2		3 " 4¾                                                          dotted line b;  t is the flat befoiled space;  Then the
                                                                      back of the archivolt is seen below it and is also the
n n 2		     2¾	(mn x 2 x nn2 should  mm r)                            section of the vertical side of the trefoil: which the
			but m m r is smaller                                                more elaborate upper horizontal section dies upon the
n3 n4		     8¼                                                        rude square moulding  The central trefoil is managed or
		     1½                                                             mismanaged in the same way:  It varies much in the form
o p		     8½                                                          of its lobes.  No 154 was traced on the most graceful I
q C		1 "  3                                                           could rach on its outer edge, the inner line is just in
                                                                      its place by section and fig 3 No 150 was traced on one of
n2 n5 (chamfer)	     2                                                the corners 4 foils only it is wrong side outwards.

cusp depth	     2½

abacus side	     3	side of shaft 2¼

     	I presume the plan to be, for the work is old and rough;
the moulding to be an octagon with its side alternately
2½ and 2 in:  2½ the faces and sides, 2 the chamers;
falling on an equal abacus of 3 each side, while the mould-
ing face divides into two fillets above not much more than
half its width.

[Version 0.05: May 2008]