<< In regard to the question of how Russell found out about Bettazzi, I
suggest looking for references to Bettazzi in Peano's work. Russell
met Peano at the 1900 congresses of mathematics and philosophy, and
started seriously reading Peano immediately after the congresses.
Presumably Bettazzi's work was better known in Italy than in
Germany >>
This seems right to me, because Peano, that gentle but indispensable
impresario of Italian mathematics ca. 1900, cites Bettazzi as a contributor
to the collective enterprise, _Formulaire de mathematiques_ (1892-95), in an
1897 article, "Studii di logica matematica," in _Atti Accad. scienze Torino_
32(1896-97), p91. Hubert Kennedy's translation (_Selected Works of GP_, U.
of Toronto, 1973, p191) spells Bettazzi with only one "t" which is going to
confuse a few computer searches.
And I see that Pat Touhey, has found the same mispelling in the original
article, which I'm glad to see exists in a library not so very far from
Brooklyn. Thank you, Pat.
-Bill Everdell, Brooklyn