Araffes are suspended from a lamp post in the sky

Experimento de Benjamin Franklin. durante una fuerte tormenta, hizo elevar una cometa con un objeto de acero, attached to a string attached to a key which would be near an electroscope, (un prototipo que mide la electricidad en los cuerpos) When the kite rose it reached a cloud and the metal collected the energy and led it along the cord towards the key., haciendo encender el electroscopio.

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