5.8 energy timeline By chris.watson98 Jan 1, 1729 Stephen Gray's discovery of the conduction of electricity. Jun 15, 1752 Ben Frankline conducts energy experiment with lightning and a kite. Jan 1, 1821 The conversion of electrical energy into mechanical energy by Micheal Faraday Dec 31, 1879 Thomas edison demonstrates his light bulbDecember 31, 1879 Apr 1, 1884 Charles Parson creates steam turbine Sep 28, 1897 Electron discovered by J. J. Thomson Sep 28, 1928 1st electric refriderator Jun 28, 1946 first geothermal heat pump Jan 1, 1954 first solar battery is created Jan 1, 1980 Hewlett-Packard launches its first PC
