That makes sense, the ones that I have come out of a lab that was shut down, they did environmental work and handled a lot of acids and solvents.
I think they were directly coupled to reaction chambers and used to introduce measured amounts of chemicals as needed.
Some of the glass work that came from this lab is very complex, I'm not a chemist, so I can only guess at what some of it was used for.
Anybody need a zero air generator?
basilisk