"Dan ... equivalent to the one above - yours just explicitly
recognizes the use of monohydrate form of the carbonate ..."
Formulas most often call for the monohydrate. It may be
the most stable form.
"Yes, I can't imagine that Beutler's can rightly be grouped
in the "fine grain" category. ... very little solvent action -
if any. Perhaps, it is more appropriate to call it an
Acutance or, High resolution dev?"
I relate more so to the term resolution. Both films and
lenses have resolutions. Can any of the other three
terms mentioned be quantified? Measured? Dan