[Footnote 13: _a c sia_. In the original text _b_ is written instead
of _c_--an evident slip of the pen.] Let _a b c_ be the fold of the
drapery spoken of above, _a c_ will be the places where this folded
drapery is held fast. I maintain that the part of the drapery which
is farthest from the plaited ends will revert most to its natural
form.
Therefore, _b_ being farthest from _a_ and _c_ in the fold _a b c_
it will be wider there than anywhere else.
[Footnote: See Pl. XXVIII, No. 6, and compare the drawing from
Windsor Pl. XXX for farther illustration of what is here stated.]
391.