What's the story of the electric kite "Philadelphia Experiment"?

1752 One afternoon in July, the weather was sultry and gloomy. Franklin took his son to the barren wilderness. Father and son prepared a big kite, which is made of silk. There is a long iron wire at the top of the kite, and the kite is pulled with hemp rope. A ribbon is tied at the end of the rope, and a key is hung between the ribbon and the hemp rope. They also brought a bottle of Leyden wine. Suddenly, the sky was overcast, the wind was strong and the thunder rumbled. This is a good time to capture the sky and electricity. They took action at once, looked at the wind direction, and the kite was quickly put into the sky.

During the storm, a dazzling lightning tore through the sky. A dark cloud quickly rolled over the kite and it rained cats and dogs. In an instant, Franklin found that all the fibers on the rope stood on end. It turned out that the metal wire absorbed the charge of the cloud and led it to the kite line. Franklin moved his fingers up and down near the rope. Strangely, the fiber standing on the rope swung up and down with the movement of his fingers. He carefully touched the key with his fingers, only to hear a "click", a blue electric spark jumped out, and his wrist was numb. This shows that the iron wire on the kite conducted the lightning, and the wet traction wire passed the lightning to the metal key below. Then Franklin held the kite higher, connected the key to the Leyden bottle and began to store lightning.

After taking back the kite, Franklin and his son hurried home with Leiden bottles. What he wants to confirm is whether the lightning in the sky has been stored in the Leyden bottle and whether it can be led out of the Leyden bottle again. When he got home, he lit the alcohol lamp with the electricity stored in Leiden bottle. As a result, the spark immediately ignited the alcohol lamp. The success of this experiment shows that lightning is indeed a discharge phenomenon, just like sparks in the laboratory. Lightning and thunder are "Leiden bottles" that discharge in the sky. Thunderstorm clouds are one electrode and the earth is another electrode. The world-famous electric kite "Philadelphia Experiment" broke the myth that Tiandian is a "sacred flame", and the mystery of lightning was finally completely uncovered.