(26-09-2020, 06:26 AM)Wladimir D Wrote: You are not allowed to view links. Register or Login to view.Conclusions I have come to
4 / Another period (reason) for undercutting with a clerical knife, seen on page f90r2, when too much parchment has been removed.
Detailing Wladimir's remark about f90r2/f90v2:
Description: On the BL 2014 images the panel f90r2 is 3496 pixels tall next to the W edge (a bit less than panel f90r1) and 3284 pixels near the E edge. Assuming the scale of 235/2534 = 0.0927 mm/pixel, that means ~235 mm and ~221 mm, respectively. Some of the difference may be due to parallax, as the folio seems to be bent convexly and sloping away from the camera for lack of support. However the ~14 mm difference may be real,due to the top and bottom edges having been cut away; see below.
With the bend and slope caveat, the panel is 2268 pixels wide near the N edge, and 2321 near the S edge; which would be ~152 mm and ~156 mm, respectively.
The vellum near the N and S edges is clean, unlike that of f90r1 which has a dark "dirty old" halo, ~2 mm wide or more, along those edges. The top edge of the f90r2 panel is slanted and looks like a sliver was cut out of it with 7 sharp cuts. Each cut, except the last one at the E end, is practically straight for most of the length, but in the last ~3 mm it bends up by ~1.5 mm and meets the next cut, forming a sharp corner with obtuse or traight angle. The first cut starts at ~10 mm from the west edge (the fold that separates this panel from f90r1); that part of the N edge has the "dirty old" halo. The lengths of the cuts (from end to end, including the final bend) are ~18 mm, ~18 mm, ~22 mm, ~24 mm, ~23 mm, ~24 mm, and ~15 mm. The portion that was cut away from the top may be a triangular sliver ~145 mm wide and ~10 mm tall at the E end.
The S edge of the f90r2 panel too seems to have been cut. There seem to have been one smooth cut from the W edge, ~115 mm wide, that ends abruptly, then a second cut that starts ~0.5 mm lower and continues to the E edge. The cuts are slightly curved, but that may be due to vellum curvature. The part that was cut away may have been another triangular sliver ~150 mm wide and ~4 mm tall at the E end.
The E edge is somewhat irregular and has a broad "dirty old" halo, ~5 mm wide.
Interpretation: The regularity of shape and relative straightness of the cuts along the N and S edges suggest that they were done with a scissor, rather than with a razor or pen-knife over a solid support. The lack of the "dirty old" halo suggests that the cuts were not contemporaneous with the writing of the manuscript but were relatively recent.
The "dirty old" band along the E edge is a bit too broad. Could it be that folio f90 had a third flap, f90.3, that was cut away along the fold, or broke off from much folding?
All the best, --stolfi