Down The Tubes?

I bought  a bunch of vacuum tubes from a surplus electronics store
that was going out of business, so many of them weren't marked as to
what tubes they were-- but they were cheap. One in particular is a
large eight inch tube that has four pins at the bottom and two
connectors for electrode caps, one at the top and another one sticking
off to the side in an "L" shaped arrangement.

It's obvious it's a power tube of some sort, but does anybody have any
idea what kind? Diode or triode? I don't know if it's a tube number,
but marked at the base by the filaments is the number 35049... Any
help indentifying this tube would be appreciated.

Ron