the world at this time. August 23 – Sacco and Vanzetti are executed in Charlestown State Prison in Boston, Massachusetts. August 24–25 – The 1927 Nova Scotia hurricane hits the Atlantic Provinces of Canada, causing massive damage and at least 56 deaths. August 26 – Paul R. Redfern leaves Brunswick, Georgia, flying his Stinson Detroiter "Port of Brunswick", to attempt a solo nonstop flight to Rio de Janeiro, Brazil. He later crashes in the Venezuelan jungle, but the crash site is never found. September September – The Autumn Harvest Uprising occurs in China. September 7 The University of Minas Gerais is founded in Brazil. The first fully electronic television system is achieved by Philo Farnsworth. September 18 – The Columbia Phonographic Broadcasting System (later known as CBS) is formed in the United States, and goes on the air with 47 radio stations. September 25 – A treaty signed by the League of Nations Slavery Commission abolishes all types of slavery. September 27 – The East St. Louis Tornado kills 79 and injures 550, the 2nd costliest and at least 24th deadliest tornado in U.S. history. October October – Niels Bohr presents his theoretical principle of complementarity at the Fifth Solvay Conference on Physics. October 4 – Carving of the sculptures at Mount Rushmore, South Dakota begins. October 6 – The Jazz Singer, starring Al Jolson, premieres at the Warner Theater in New York City. Although not the first sound film, and containing very little recorded speech, it is the first to become a box-office hit, popularizing "talkies" (although silent films continue to be made for some time). October 8 – The "Murderers' Row" team of the New York Yankees complete a four-game sweep of the Pittsburgh Pirates in the World Series baseball championship in the United States. October 9 – The Mexican government crushes a rebellion in Veracruz. October 18 – The first flight of Pan American Airways takes off from Key West, Florida, bound for Havana, Cuba. October 25 – The Italian ocean liner Principessa Mafalda capsizes off Porto Seguro, Brazil; at least 314 people are killed. October 27 Queen Wilhelmina of the Netherlands opens the Maas–Waal Canal in Nijmegen, the Netherlands. At 5:50 a.m. a ground fault gives way, causing the mine and part of the town of Worthington to collapse into a large chasm located in Ontario. Nobody is injured in the incident, as the area has