When I ripped out a framed wall in the basement, I found a porcelain fixture on the wall. This is what it looks like, front and back:
The wires had already been cut, although there are three wires hooked to the top (I'm assuming that one is a ground) and two wires hooked to the bottom. The reddish "bars," which are hollow, but with something inside of them, appear to conduct current from the top wires to the bottom (or vice-versa).
Right above the circular part (which is threaded), you can barely make out the words "Western Electric" raised on the porcelain.
The back side seems to have an "E" shaped depression and two other square depressions that are filled with a waxy substance.
And now for the thirty-seven dollar question:
Just what in the heck is this? Anyone? Anyone? Bueller?