His most significant discoveries, however, were in the field of electricity. His famous kite experiment proved that lightning is an electrical phenomenon. In 1774 he invented a cast-iron open heater, which projected out from the chimney and radiated heat from the back and from the sides as well as the front (126).
Later in 1787, Benjamin Franklin fell down the stone steps just outside his house. He was badly bruised, and after that he stayed mostly in his bed. He began to put his financial house in order, to write his will. Benjamin franklin was a wealthy man. He had cash, bonds, and shares in the bank of North America. Benjamin franklin had trouble breathing. Then he rallied. The pain was mostly gone. His breathing improved. He got up, so that his bed can be made, so that he could “die in a decent manner.” His daughter, sally, said she hoped he was better now and would live many years more. Benjamin franklin replied, “I hope not.” (Adler