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Births on June 29

Alexander Friedmann
1888Jun, 29

Alexander Friedmann

Alexander Friedmann, Russian physicist and mathematician (d. 1925)
Alexander Alexandrovich Friedmann (also spelled Friedman or Fridman ; Russian: Алекса́ндр Алекса́ндрович Фри́дман) (June 16 [O.S. 4], 1888 – September 16, 1925) was a Russian and Soviet physicist and mathematician. He is best known for his pioneering theory that the universe was expanding, governed by a set of equations he developed now known as the Friedmann equations.

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Events on 1888

  • 16May

    Electric power transmission

    Nikola Tesla delivers a lecture describing the equipment which will allow efficient generation and use of alternating currents to transmit electric power over long distances.
  • 31Aug

    Jack the Ripper

    Mary Ann Nichols is murdered. She is the first of Jack the Ripper's confirmed victims.
  • 4Sep

    Kodak

    George Eastman registers the trademark Kodak and receives a patent for his camera that uses roll film.
  • 8Sep

    Annie Chapman

    In London, the body of Jack the Ripper's second murder victim, Annie Chapman, is found.
  • 30Sep

    Elizabeth Stride

    Jack the Ripper kills his third and fourth victims, Elizabeth Stride and Catherine Eddowes.