Johhn Appleseed. Wait, he's an American, you most like wouldn't be referring to him. Must be Adam. No wait... Ok, Leibnitz! No wait, it's that guy that copied Leibniz, what's his name, they even named a chair after him.... Newton? Before me... Must be Guy Fawkes' Day... no, that's in July, aint it? Columbus Day? All kidding aside, your galvanic battery is a great experiment; I think we did potato batteries in either Cub Scouts or school. I wish we'd had extremely low- power devices to hook up to it; we just used a voltmeter to demonstrate the output. -dq