86											82
                                                                      
                                                                      	b c is at the true maximum width of enclosed foliating
                                                                      space in cusp of small arch:  the cusp of the trefoil
                                                                      in the round is about twice as deep (a is same line in all
                                                                      these sections)
                                                                      C. Through great roll and cusp of central or lateral 4 foil
                                                                      only lateral have no outer fillet, tak[x]e the dotted line
                                                                      and in central;  between the cusps x y is slurred into x2
                                                                      D. through cusp of great circular 4 foils;  the dotted
                                                                      line being section between cusps.  F. through upper triangl[e]
                                                                      and G. on the abacus of pendant of small sub arches.
                                                                      The expedient employed in the altered section C. by
                                                                      missing the cavette and smaller roll, and thi[x]s enormously
                                                                      deepening the cusp, to get greater space for foliation is
                                                                      to be carefully noted:  Again in G. note that - all being
                                                                      to same scale,m,n is double of m2 n2 in B.  Why this is,
                                                                      will be seen in the very careful profile of the entire 
                                                                      cusp of sub arch at F. H. which shows also the same law
                                                                      observed in the circle above:  and the neat adjustment
                                                                      of that circle exactly to the apex of pointed arch;  the
                                                                      junction is clearer at K.
                                                                      It is evident that in this tracery there is no thought of
                                                                      a continuous series of 4 foils cut off.  It is complete
                                                                      in itself like the traceries of the North.
                                                                      But by far the most curious Frari tracery is that on No
                                                                      150 - it is one of the pairs of arches which cross the
                                                                      windows of the small

[Version 0.05: May 2008]