It is actually an old fashion orthopedic surgery table with traction, good for spine surgery. It was also used in full body casting. I have seen a similar table in the present day.
In the asylum in the town next to mine they used to strap patients down in a bathtub and let them bath for as long as it would take for them to calm down, instead of padded cells. It did happen that it would take like a day or two before they finally would settle down, and could be released back into their cells. There would be someone that continiously monitored the watertemp. The tub didnt have a tap on it, instead there was a waterpipe going straight into the tub which had controls on the wall a few feet away, regulating waterflow and temp.
I read Peat Moss' comment and couldn't help reflecting over it... I think it's a pity asylums everywhere is getting shut down and just abandoned and the patients just thrown out into the streets again. Many of them falls into homelessness instead of having roofs over their heads in an asylum. At least where I live (Sweden) there used to be an extensive mental care throughout the 20th century, but in the eightees they started to shut the asylums down everywhere, and todays psychic care is nothing more than a joke compared to what used to be. Since the mental care here more or less has been laid down (they only treat the absolutely worst psychopaths) the maniacs and psychos runs around everywhere and sets things on fire, rapes people, or even commiting homicides, etcetera. The belief that the patients will recover better living free to do anything they want is strong. But they refuse to see it's downside, that mentally ill people can't always control themselves.
The city next to mine used to be only a small village with only a couple of hundred residents until the early 1900's when they started to build the massive insane asylum there that would house more patients than the entire citys population. If it wouldn't have been for this asylum the town would still only be a little village today I think. You could say that it's the asylum that built the entire city. The original asylum had a capacity of about 1500 patients max, it has now been replaced with a new single building that can take as much as 110 patients. I find it to be very upsetting that they don't take this more seriously!!!! It's better for everyone if there would be a well developed mental care that has room for all mentally ill, they get roof over their heads and care and the rest of soceity will get calmer.