Franklin begins his experiments with electricity, inspired by demonstrations he witnesses in Boston. He quickly becomes deeply involved in the study of electrical phenomena.

Franklin conducts his famous kite experiment to prove that lightning is a form of electricity. He flies a kite during a thunderstorm, attracting electricity and demonstrating its connection to lightning. While some historical accounts differ regarding the exact method, the core concept remains central to his scientific legacy.

Franklin publishes 'Experiments and Observations on Electricity,' a collection of his scientific findings that gains him international recognition and earns him membership in the Royal Society of London.

Based on his electrical experiments, Franklin invents the lightning rod, a device designed to protect buildings from lightning strikes. It quickly becomes widely adopted, saving lives and property.

Franklin invents the Franklin stove (also known as the Pennsylvania fireplace), a more efficient and safer heating device than traditional fireplaces. He chooses not to patent it, believing it should be freely available for public use.

Franklin is elected a Fellow of the Royal Society of London, a prestigious recognition of his scientific contributions.

Around this time, Franklin is credited with inventing bifocals, eyeglasses that combine lenses for both near and far vision, allowing users to see clearly at all distances.