Mercury use (WAS RE: hospital surplus)

[Tony Duell]

> And as primary cells--mercury cells have a remarkably stable voltage output
> over their life. 

[Looks sadly at all the classic cameras around here that are more 
difficult to use now that ther mercury cells for the exposure meters are 
unavailabe. Yes I do know of the work-arrounds...]

IIRC the Weston standard cell is a mercury/cadmium couple.... Although to 
be fair a good bandgap voltage reference is accurate enough for anything 
I am likely to need, and a lot less hassle.

-tony