At 02:57 PM 10/31/02 -0600, you wrote:
>  Hi Mark and Everyone,
>
>Mark asked
>
>"What would be the best way to provide this ventilation between brood
>boxes?  A drilled hole? Some other way?"

I use a box that serves as an inner cover, ventilation box,
an insulated cover (with the addition of a sheet of insulation
inside the box) and and upper entrance.

It's a combination of ideas from Bee-Culture, some supply catalogs,
and several more experienced bee keepers.  (Why use a different
piece of hardware for each function?)  It might be overkill, and
even unnecessary, and I only one winters use to testify to their
usefullness.  Lost no hives (12) last winter and all were extremely
strong in late march with plenty of stores.  I'll have to see how this
year goes.

-Tim