old technology

Hi all, been lurking a while and finally created an account to show these really cool lighting controls!The docent who sent the images said they're circa 1910s-1920s. These are still functional. People occasionally use them to show that they work, and wear thick insulating gloves when they do...

Hello,I was looking at the lighting situation in a dining hall in MIT's student center and they built in some stage pin and dimmer boxes around the room, likely when they first built the building. I don't recognize the connections for the dimmer and was wondering if anyone here could identify...