[St M.30L]                                                            [St M.30]								30
                                                                      
[blank]                                                                   First of the five porch inner arches: that
                                                                      next sea
                                                                      					First Porch
                                                                      
                                                                      [diagram] a  b  P   P2   c
                                                                      
                                                                      Let a  p  b. a  p2  c.  b the line of under edge of
                                                                      the slabs which take the place of the usual dentil
                                                                      and let a  B.  a  c  each  =	2  “  0  (-)
                                                                      then     b  c		 =	3  “  5 ¼
                                                                      The curve is reversed at almost a fixable
                                                                      point  4 inches above b. on  c.
                                                                      And the vertical masonry joint produced through
                                                                      				         or
                                                                      the dentil slab would cut  a  p  b,  5 to  6 inches
                                                                      under b  or  c.
                                                                      Next. Let a  e. f. be the top of the outer
                                                                      moulding . under its figure.
                                                                      
                                                                      [diagram]  e   f   d   g   h   c
                                                                      				e d the bead moulding
                                                                      				outside archivolt
                                                                      				from the shoulder up.
                                                                      				G  c. the dentil slab.
                                                                      
                                                                      				Then . C c . the entire
                                                                      				height of the arch under
                                                                      				soffit is	6  “  3 ½
                                                                      
                                                                      And
                                                                      then. e .  f. across  (-) = about 5 in.
                                                                      d. g. breadth of entire facial archivolt moulding
                                                                      		=	1  “  4.
                                                                      d  e  also	=	1  “  4
                                                                      g  h. the breadth of dentil slab. about 1 1/2 in
                                                                      
                                                                      				Done.

[Version 0.05: May 2008]