Good starting points for the Beutler Formula:

EI 25-50 films-1+1+10 dilution and 6-10 minutes @ 68 deg. F.
EI 64-125 films-1=1+10 dilution and 8-12 minutes @68  deg. F.
EI 400 films-1=1+10 dilution and 10-12 minutes @ 68  deg. F.
T-Max and Delta Films-1+1+10 dilution and 10-12 minutes @ 68 deg. F.

Agitate continuously for first two minutes, 5 seconds every 30 seconds thereafter.