July 7 
1668: Sir Isaac Newton received his M.A. from Trinity College in Cambridge. 1802: The first comic book "The Wasp," was published. 1816: Astronomer Rudolf Wolf, who discovered the 11-year sunspot cycle, was born. 1914: Robert Goddard received a patent for his two-stage solid fuel rocket. 1930: Construction began on Boulder Dam (later renamed Hoover Dam). 1930: Sir Arthur Conan Doyle, of Sherlock Holmes fame, died. 1936: Several U.S. patents were issued for the Phillips-head screw and screwdriver to its inventor, Henry Phillips. 1950: The first Farnborough Air Show was held. 1952: The last London tram, No. 1951, ceased operation. 1981: Solar Challenger, the first solar-powered aircraft, crossed the English Channel. 1986: IBM-PC DOS Version 3.2 (updated) was released. 1997: The temperature dipped to 24 °F in Tower, MN. 2005: Muslim extremists attacked the London transport system, killing 37 people. |