Test tubes for salt water cap?

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Original poster: Paul Nicholson <paul-at-abelian.demon.co.uk> 

Hi All,

Has anybody tried using laboratory test tubes in a salt water
capacitor?  I was thinking that the rounded bottom would reduce
the electrical stress that you would otherwise get around the
edge of a flat bottom.  The glass is thin and you could rack
a whole lot of them in a modest sized tank. Wonder if they'd
stand the voltage?

If these were any good, perhaps used ones that a laboratory is
throwing out would be a cheap source.
--
Paul Nicholson
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