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Franklin declared that this "sentry-box experiment" showed that lightning and electricity were one and the same. [15] Franklin realized that wooden buildings could be protected from lightning strikes, and the deadly fires that often resulted, by placing a pointed iron on a rooftop, with the other end of the rod placed deep into the ground.
[10] [11] [12] However, Franklin noticed that loose threads of the kite string were repelling one another and deduced that the Leyden jar was being charged. He moved his hand near the key and observed an electric spark, [ 6 ] which proved the electric nature of lightning.
Experiments and Observations on Electricity is a treatise by Benjamin Franklin based on letters that he wrote to Peter Collinson, who communicated Franklin's ideas to the Royal Society. [ 1 ] [ 2 ] The letters were published as a book in England in 1751, and over the following years the book was reissued in four more editions containing ...
The arrangement directs the viewers' eyes to Franklin's hand and the lightning key. West amplifies this effect by clearly defining the edges of the key and making the surrounding electricity more pronounced than the lighting in the distance. [2] Franklin's head and gaze are fixated upwards looking beyond the canvas towards the heavens.
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The system of operation of the Franklin clock considers that the electrostatic force generated by an electric field is used to move the pendulums that strike two metal bells. [9] [10] The Franklin bells uses a metal rod as a lightning rod to attract current. One bell is connected to the lightning rod and the other bell is connected to the ground.
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