> But... but... but...  it's got Mercury in it!  I'd be really 
> surprised if that's allowed to be sent though the
> post, and as for the seller sending it "Worldwide", Mercury is 
> certainly banned from aircraft.  Place a drop
> of it on a piece of Aluminium to see why  :-)

Closer to home.
Take a strip of copper foil.
Run a well tinned soldering iron across the strip so it leaves a 
solidish solder trace across the surface.
Foil will now mechanically fail at solder line when stressed.


        RM


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