[OT] Figured bass numbering practice: +4 / 4+ / 4# / #4

[flup2]

Hello,

I'm engraving a work with figured bass numbering: concerti grossi n° 1 -> 6
by Geminiani, based on Corelli's op. 5

My problem is that it uses several different numbering that have, for what I
now, the same meaning: for instance +4, 4+, #4, 4#. Sometimes, that
concertino cello part uses +4, the bass in the grosso (ripieno) shows a 4+
at the same time.

Does someone know what could explain the use of different numbering for the
same meaning? Could it come from different engravers (the work was publish
in 1727 in London, as separate parts, not as a score)? A later version of
the same work (published in France 30 years later) show sometimes (not
always) the same thing, being perhaps a copy of the original publishing.

Philippe



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