http://jenya444.livejournal.com/ ([identity profile] jenya444.livejournal.com) wrote in [personal profile] jenya444 2023-04-30 10:52 pm (UTC)

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On 30 April 1897, British physicist J. J. Thomson presented his research of cathode rays culminating in the discovery of the electron. The announcement took place during an evening lecture to the Royal Institution in London.

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