Hi John,


You saw Jim's reply, but

> a grey stripe with a 0 on it and this is adjacent to the shorter of the two 
> leads.  If I recall correctly, this is the negative lead,

Is it a rather oval 0?
The tradition seems to be a grey minus (rounded rectangle) within a black oval 
within a grey band on a black background.
A case of not quite making up their minds what the colour scheme is? ;-)

You may also find some (for want of a better term) crease lines on the exposed 
metal end of the can. I think these are purposely weak so that if it goes it 
blows there, with little containment (in the explosives sense). I can vouch for 
this, as from time to time one of our students puts one wrong way round on the 
15V line. They go off with a very satisfying bang! ... followed by other 
students crowding round the bench to see what had happened. The end of the can 
shears along the crease lines and the bits peel back like petals, allowing 
fluffy stuff to be ejected fairly harmlessly.

73,
Clank

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