90 Miles From Tyranny : June 10, 1752: Benjamin Franklin Flies His Famous Kite

Wednesday, June 10, 2026

June 10, 1752: Benjamin Franklin Flies His Famous Kite

The kite experiment was conducted by Benjamin Franklin in June 1752 to demonstrate that lightning is a form of electricity. He flew a kite with a metal key attached to collect electrical charge from storm clouds, which helped establish the connection between lightning and electricity.

Overview of the Kite Experiment

The kite experiment was a significant scientific endeavor conducted by Benjamin Franklin in June 1752. Its primary aim was to demonstrate that lightning is a form of electricity.

Experiment Details

Materials Used:

A kite made from a silk handkerchief
A hemp string (wet for conductivity)
A silk string (to keep Franklin insulated)
A metal key attached to the hemp string
A Leyden jar (to store electrical charge)

Procedure

Franklin and his son William flew the kite during a thunderstorm.
The wet hemp string conducted electrical charge from the storm clouds to the key.
Franklin remained sheltered to avoid electrocution, keeping the silk string dry.
Observations

Franklin noticed that loose threads of the kite string repelled each other, indicating an electrical charge.
He felt a spark when bringing his hand near the key, confirming the presence of electricity.

Significance

The kite experiment established the connection between lightning and electricity, contributing to the understanding of electrical phenomena. It also led to the development of the lightning rod, which provides a safe path for electrical discharges to the ground.

Key Accomplishments of Benjamin Franklin:

Founding Father Contributions

Drafting the Declaration of Independence: Franklin was a member of the Committee of Five that drafted this pivotal document.
First U.S. Postmaster General: He served in this role, establishing an efficient postal system.

Scientific Innovations

Lightning Rod: Developed to protect buildings from lightning strikes, significantly reducing fire hazards.
Bifocals: Invented to address his vision problems, allowing for both distance and reading vision in one pair of glasses.
Franklin Stove: Created a more efficient heating system for homes, reducing smoke and wood usage.

Civic Engagement

Founding Civic Organizations: Franklin established several institutions, including the Library Company of Philadelphia and the University of Pennsylvania.
Diplomatic Efforts: As a diplomat, he secured French support during the American Revolution, which was crucial for American independence.

Other Notable Inventions:

Swimming Fins 1717 Designed to improve swimming efficiency.

Flexible Catheter 1752 Created to provide a less painful alternative for patients.
Glass Armonica 1762 A musical instrument made of spinning glass.

Legacy
Franklin's diverse contributions as a scientist, inventor, and statesman have left a lasting impact on American society, making him one of the most influential figures in U.S. history.

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