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[M.99L] [M.99]
No 75 Ducal palace. Balcony to Front 99
I have yet seen of ridge tracery: its section marked at A
is exquisitely cut - as sharp as marble can be - and as even as
the whirl of a ball: but the hollow of the cusp is
very rudely cut, and rough, as of no consequence. Note the
head of the foliation is not part of a circle but deep
horseshoe - l elliptical downwards or rather a stilted
Fig 2 No 74. is inaccurate in the red section, which may serve to show circle: the top of it touches - sometimes even sweeps a
how much my eye deceives me in drawing mouldings - always too little into - the base of the ridge. The scymitar shaped
large, unless adjusted. fitting the paper to the marble I found cusp is very beautiful. Fig 1 section through small
fig 2 C: the true section between two 4foils inside and fig 2 D rose with the ridges at side of it; showing the mere
outside b2 in C is the joint towards the white marble (as at M2 in incisions which form it: This ball rose is only on the
the large fig of No 74. when from a2 up all again is too large, drawn outside of the balcony - inside, the [diagram] space is left flat
by the eye.) and the joint at dc or e f or hl or im in fig 3 as at B.
of No 100 and it is the edge of the other 4foil at x in the same Fig 2 section of bar between two 4foils, but vid below
figure. No in account of No 100.
D fig 2 No 74 is the correspondent outside section and in my calculations Fig 3. Profile of vertical rose, across: real size
made fig 3 No 100. I should have said, not twice the excess of b on a in - a b accurately measured, width of cusp, falling on it
C, but that excess + excess b on a in D: : which however, is, (I doubt a c - b d - of the ridge, as seen below - c2 d2 which
is a section of the tracery bar falling on it. The two
strong lines M M are the joints where the red marble
of the foliation is set between the white of its cornices.
No 75. Tracery of the 4 foil of No 74 traced actually on the
stone: the line being the sharp top of the ridge.
LINE
not) the same. Vid also p 115 and No 101.
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[Version 0.05: May 2008]