[split] Line padding, layout, Currier's "groups of letters"...

[arca_libraria]

I think it may have come from a smaller animal [...]

Quoting myself here as I realise that my original post wasn't especially clear English. I do not mean that f. 112 or any of the other smaller pages are made from the skin of different animals such as sheep or goats, I mean that there is variation in the size of cows due to maturity, breed, season etc., so there can also be variation in the size of sheets of parchment obtained from cow skins.

To return to the original thread topic of line padding and layout - has there ever been any work comparing the width of each glyph? I know there are multiple different transcriptions that all have strengths and weaknesses, and each divides the glyphs and spaces up slightly differently, but has anyone measured whether the glyphs get wider at the end of a line in order to achieve the right-justification? Or do the glyphs have a relatively consistent width within each line without any significant stretching towards the end of the line?