On this day in 1752, Benjamin Franklin flies a kite during a thunderstorm and collects a charge in a Leyden jar when the kite is struck by lightning, enabling him to demonstrate the electrical nature of lightning. Franklin became interested in electricity in the mid-1740s, a time when much was still unknown on the topic, and spent almost a decade conducting electrical experiments. He coined a number of terms used today, including battery, conductor and electrician. He also invented the lightning rod, used to protect buildings and ships.
Franklin was born on January 17, 1706, in Boston, to a candle and soap maker named Josiah Franklin, who fathered 17 children, and his wife Abiah Folger. Franklin's formal education ended at age 10 and he went to work as an apprentice to his brother James, a printer. In 1723, following a dispute with his brother, Franklin left Boston and ended up in Philadelphia, where he found work as a printer. Following a brief stint as a printer in London, Franklin returned to Philadelphia and became a successful businessman, whose publishing ventures included the Pennsylvania Gazette and Poor Richard's Almanack, a collection of homespun proverbs advocating hard work and honesty in order to get ahead. The almanac, which Franklin first published in 1733 under the pen name Richard Saunders, included such wisdom as: "Early to bed, early to rise, makes a man healthy, wealthy and wise." Whether or not Franklin followed this advice in his own life, he came to represent the classic American overachiever. In addition to his accomplishments in business and science, he is noted for his numerous civic contributions. Among other things, he developed a library, insurance company, city hospital and academy in Philadelphia that would later become the University of Pennsylvania.
Most significantly, Franklin was one of the founding fathers of the United States and had a career as a statesman that spanned four decades. He served as a legislator in Pennsylvania as well as a diplomat in England and France. He is the only politician to have signed all four documents fundamental to the creation of the U.S.: the Declaration of Independence (1776), the Treaty of Alliance with France (1778), the Treaty of Paris (1783), which established peace with Great Britain, and the U.S. Constitution (1787).
Franklin died at age 84 on April 17, 1790, in Philadelphia. He remains one of the leading figures in U.S. history.