Technology

Vacuum cleaner invented by Hubert Booth.

Pendulum clock invented by Christiaan Huygens.

Stock ticker invented by Thomas Alva Edison.

Digital satellite radio.

Thermometer invented by Rene Antoine Ferchault de Reaumur.

London to Paris air service begins.

William Herschel discovers the planet Uranus.

Uri Gagarin is the first man in space.

Vacuum pump invented by Otto von Guericke.

Rotary printing press invented by Richard M. Hoe.

Adding machine invented by Blaise Pascal.

Hertz produces radio waves.