Benjamin Franklin

Franklin engaged in many public projects. In 1731 he founded what was probably the first public library in America, chartered in 1742 as the Philadelphia Library. He organized the first fire company in that city and introduced methods for the improvement of street paving and lighting. Always interested in scientific studies, he devised means to correct the excessive smoking of chimneys and invented, around 1744, the Franklin stove, which furnished greater heat with a reduced consumption of fuel.

In 1747 Franklin began his electrical experiments with a simple apparatus that he received from Peter Collinson in England. He advanced a tenable theory of the Leyden jar, supported the hypothesis that lightning is an electrical phenomenon, and proposed an effective method of demonstrating this fact. His plan was published in London and carried out in England and France before he himself performed his celebrated experiment with the kite in 1752 and invented the lightning rod.