October 4: Huygens patent, Gothenburg football club and Tu-154

On October 4, 1675, the Dutch physicist Christian Huygens patented a pocket watch. He belongs to the invention of the clock spiral, replacing the pendulum, which is essential for navigation; The first spiral watches were designed in Paris by the watchmaker Tyure in 1674.

1762 - The premiere of the opera "Orpheus and Eurydice" by German composer Christophe Gluck took place in Vienna.

1812 - botanist Christian Christianevich Steven laid the foundation for the Nikitsky Botanical Garden. They collected more than 4,500 plant species, and the total number of trees planted was 14,332 specimens.

1875 - By the decree of the Emperor of Austria-Hungary Franz Joseph, the Chernivtsi University was founded on the basis of a theological institute that existed since 1827.

1904 - Gothenburg football club was established in Sweden.

1927 - The International Social Security Association was founded in Brussels on the initiative of the International Labor Organization.

1937 - a critical article appeared in the Pravda newspaper, according to which the Ukrainian language should be brought closer to Russian.

1957 - The first artificial Earth satellite was launched in the USSR.

1968 - The first flight of the Tu-154 passenger aircraft took place.

1991 - leaders of all republics of the USSR, except for the Baltic, signed an agreement on economic cooperation.

1999 - in the United States created a center for the supervision and control of crime on the Internet. The duty of the new center is to detect the results of hackers in the network and then promptly notify banks and financial institutions about the threat posed by hackers.

2004 - "SpaceShipOne" made a second valid suborbital space flight and won the "Ansari X Prize".