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Events on Sunday 21 June 1874 1
1814 – 1874Anders Jonas Angstrom (1814-1874)Died 21 June 1874, aged 59Angstrom was a Swedish physicist and a founder of the science of spectroscopy. His precise measurements of the solar spectrum used a unit of length later named the angstrom in his honor. He also produced an early atlas of the solar spectrum.