1888- The patent for the circular saw is filed.
This Day in History
1904- Construction begins on the British ocean liner, the RMS Lusitania.
1951- the Delaware Memorial Bridge over the Delaware River opens for the first time.
2008- Construction begins on the Consol Energy Center, home of the Pittsburgh Penguins, in Pennsylvania, U.S.A.
1913-Stainless steel is invented.
1909- the Indianapolis Motor Speedway opens.
1896- Electric light bulb socket with a pull chain is patented.
2014- the Millennium Palace, one of the tallest buildings in Latin America, opens in Brazil.
1930- the Polish Stadium Army, a 31,103-seater stadium in Poland, opens.