If it is a vacuum press it could well have been used for making splints and the like. I've seen similar used in podiatrists. My first thought was some form of small steam sterilizer, for small procedure instruments.
Looks like what's known as a 'slit lamp'. The idea is that light is shone into the patient's eyes and it bouces off the retina. The doctor can see the state of the retina, or scan the eye for foreign bodies. You'll likely find the knobs will change intensity and slit shape/color.
Hospital Biomedical Engineer here. Yes these muscle stimulators/TENS call them what you will put out a form of AC current. You'd likely find a couple of the dials are for amplitude and frequency, the gauge would be for output milliamps.
One can also use a Muscle Stim to check depth of anaesthesia.
Prohibition is worse, because an addict will sacrifice everything to get their drugs, which will be available no matter how prohibited they are. All the laws do is jack up the price, giving addicts the choice between food and shelter or drugs. That isn't a choice for an addict.
I'm torn between my instincts as a historian and my belief in privacy. If they go anywhere it should be a hisotical society or the Smithsonian/National Archives ... they are old enough that the right to privacy isn't as relevant.
ChicagoTom, I know the feeling. I've spent ten hours over the last three days since I found this site. Motts' work is superb, both in the search, infiltration, photography, and web site design.
Lynne's comment about Americans being stingy about paying taxes makes an important point: our society as a whole should take responsibilty for the abuse of clients placed in the hands of poorly paid, overworked providers. It is difficult work and the provider is only human, as are we all.
I once talked to some park rangers about getting permission to photograph inside the abandoned buildings, they seemed to think it might be possible ... but this was ten years ago ..