The above image was published by Currier & Ives 120 years after the experiment was done. After some accumulation time, Franklin would put a finger near to the key and look for a tell-tale spark that would confirm the flow of electricity from the sky to the ground. The idea was that the metal spike would collect electrical charge from the sky and the charge would then flow down the string where it would accumulate in the key. Also tied to the key was an insulating silk ribbon, which was held by Franklin as he flew the kite. The other end of the kite string was fastened to a metal key. To do this, Franklin fastened a small metal spike to a kite and connected the spike to a conducting kite string. However, according to the Brazilian historian Breno Arsioli Moura, most illustrations of the experiment misrepresent what Franklin is believed to have done.Īccording to Moura, the purpose of the experiment was to show that electricity can flow like a fluid from the sky to the ground.
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