No 189

Bourges Cathedral ‘note that in the piers described on No 188 which have the three ribs to carry - diagonals added; are larger than the alternate ones, and their lower shafts are set further apart. Therefore in the small pier the section is as fig 1 No 189, in the larger the basic members are as fig 2 and the rest of the arrangement the same. The figures in fig 1 show levels in No 190 where same letters are used. I have not before seen a case of systematic projection of the roll c over d. all round except at angles. Bases. It is better than the irregular projection at Lyons - the outer line at g₂ is right, and e e₂ should be parallel with it. Notebook M2 p.177.

[Version 0.05: May 2008]