>| But since Gutenberg (we presume: his type doesn't survive) types
>| always had varying widths: until the manual typewriter and
>| "monowidth" type that emulated typewriter characters.
>yes, but that is not the same as cutting the same glyph of the same
>height in varying widths for the sole purpose of having enogugh samples
>to allow right-justification.
Sure, it isn't the same. But I think Rodolfo and I have given you
some good pointers to what was really going on here: Gutenberg was
imitating handwritten models. That is *the* characteristic of
handwriting: every glyph differs. And also -- there are very many
word-breaks in Gutenberg's printing. That helps justification a lot.
It's true that the spaces between the words in G's pages are close
and even-looking. But what makes you think that Gutenberg did not
vary the spaces (just a little) between the words?