Stephen Gray - 1667(96?) - 1736
i metalli trasportano l'elettricità

Stephen Gray, in 1729, discovered that the electric force, made by rubbing glass, could be sent for long distances over a wire. The electricity could, thus, be separated from the rubbed bodies and wasn't an exclusive property of some material.
The figure shows that the electric force of a rubbed glass could be sent throught a wire, to the body of a person. There is not a direct contact.


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