I had to split this up as there are too many pictures for one post. Thanks heaven for the thumbnail function! this should make it possible for dial-up users to load this thread.

Two older light switches:
[Linked Image from electrical-photos.com]
The white one is likely late 1960s or early 1970s, the black one dates back to when the house was first wired for electricity. It's one of the two remaining original switches.

At this point we had removed most of the very loose plaster and you can somewhat guess the layout of the original wiring.
[Linked Image from electrical-photos.com]
Lots of junction boxes near ceiling level and mostly vertical runs to switches and receptacles. By the way, this used to be a dirty yet functional kitchen.

[Linked Image from electrical-photos.com]
The term "hot rod" gets a whole new meaning considering the curtain rod was nailed right through this piece of conduit... thankfully it was made of wood and likely the nail didn't even hit the wires inside the conduit- they can move a little..

The picture also shows the oldest kind of conduit, Bergmann conduit. It's made of very thin metal with an interior lining of tar paper. Bending it required a parrot beak-like tool which indented the interior radius. Each of these indents was made individually and spaced to create the desired bending radius. One had to be very careful not to rotate the conduit while making the bend.

[Linked Image from electrical-photos.com]
The last image for this round shows a few different kinds of conduit - top: old dark grey rigid PVC conduit, bottom: modern light grey flexible conduit. Also shows the Perilex 3 phase receptacle used to connect the electric range (a rare thing to find but a real good idea, one of the very few good things they did in this house).