G&M wrote:

"Smudger" smudger@here wrote in message
.. .

"Sunbeam" wrote in message
...
I want to obtain about 40ml mercury to refill an open cistern barometer.
Any ideas for a supplier please?

or if you know someone who works in a secondary school, they
might be able to help.

I think it's now a restricted substance. A whole generation won't know the
fun of seeing how many times you can divide a globule of the stuff with your
fingernail :-)

You can use gallium/indium alloy as a substitute.
Comparatively non-toxic, and can be rolled around in your hands.

Sodium/potassium alloy is much cheaper, but has the disadvantage that
it'll burst into flames when you do that.