tuning forks & pitch raises

[John M. Formsma]

List,

With all the talk recently about those who are using the metal forks, how
does one do pitch raises aurally--i.e, how does one determine how flat a
piano is and how sharp to tune it so that the pitch will fall, leaving the
piano fairly close to pitch for fine tuning?

With the Accu-fork, it is simple since it has a slider adjustment allowing
one to easily determine the pitch of a piano before a pitch raise.  How is
it done with a metal fork?

Just curious.

John Formsma
Blue Mountain, MS