Besides the experiments with the kite, Franklin tried to prove his theory in some other ways. On the top of his own houses chimney he attached iron rod to attract the lightning. Iron rod was about 2,80 meters long. On the bottom of rod he attached wire and put it into glass pipe. Other end of wire was attached to the bell in the hallway. The other bell was about 15 centimeters from the first one and between them he put small brass ball attached to the silk string. The sechond bell was grounded with wire on the water pump in his back yard.

Every time the lightning striked, the iron rod on the top of the roof would become electricly charged and he could hear bells. Sometimes the quantity of electricity was enough to iluminate the whole hallway so he said that you could find a needle.

Bells rang often what we can see from his wifes letter, which begs him to explain her how to disconnect that "thing" because it rings during almost every thunderstorm.