"Bob" wrote in message
...

"Tom S" wrote in message
news

A lot depends on fermentation rate. Some depends on the yeat's
conversion
efficiency. Ambient temperature certainly plays a role, as do container
size and composition.

Yes, temps play a role, and somewhere somehow I LOST the blasted
conversion table that came with my hydrometer. AAARRGGHHHH!!!!!! Container
size and composition play no role in determining sg at all.

I didn't mean to imply that they did. What I meant was that a larger
fermenter will run hotter during fermentation and burn off more of the
alcohol via evaporation, resulting in an apparently lower conversion
efficiency. Same goes for a well insulated fermenter as opposed to one that
is not.

Tom S