When the hospitals became overcrowded and no one would increase their funding they had to make use of what space they had, so one of the ideas was to try to separate the space by using dividers. In some of the pictures of old hospitals you will see up to 60 beds crowded together in one medium sized room, where the beds were side to side and head to foot and you could only get to them by hopping from one to another. Even though pony walls look like a huge lack of privacy to us these days, back then any setting aside of space was unusual and was intended to give the person a small sense of personal space. Most of the time pony walls were used for folks who were not ambulatory or who would not wander into each others' space and destroy their belongings.
There are still a number of places where several people may stay/sleep together in one room, especially if they are medically fragile and all need the same intensive support and same type of medical equipment, but most places have done a significantly better job of setting aside private areas in the rooms.
Yes, a lot of facilities used these half-walls or "pony walls" to separate rooms so each person had some space, although obviously not a lot of privacy. Building code won't allow for these any more though, and if you have them you'll be fined.
Yes, the size is about right - you needed to be able to look in to make sure the person was OK if they suddenly got quiet. If the window was too big it would be distracting to the person who was supposed to be in a less stimulating environment and it would be too public - the person would become increasingly agitated and this is one of the few "interventions" they had before medications were developed.
A seclusion room was only supposed to be used if the person was too excited or wound up to be in a regular "stimulating" environment but they weren't supposed to be used if the person was suicidal or engaged in self-injurious behavior. Doesn't mean they always worked the way they "should" have or were always used the way they were designed, of course.
I hadn't heard that medical schools put all the bodies in a tank together. Any place in particular you heard this occurred at? Just curious - seems unusual.
Riss,
Green is the color opposite of red. After looking at all the blood over a few hours it would help your eyes to have a contrasting color to look at.