Jim, I'm not sure that I still have it (it's the sort of thing which gets buried DEEEEEP in the cupboards). I'll see what I can do, though. Basically it is a simple clock in the middle with electrodes. There are cups on either side of the clock and rather behind it. You can stick anything which is slightly acidic in the cups. Potato halves or lemon halves or whathalve you ;^) but I think they need to be the same type (potatoes on both ends) for the voltage to work correctly. I remember testing it and, yes, it did work as advertised. Dratskies! I don't have time to go rummaging and it is going to haunt me until I uncover it and drag it back into daylight. Hmm... I'm almost afraid of your evil ideas, but will aid and abet if possible. Carolly