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Births
1877- Ugo Cerletti, Italian neurologist
1887 – Sir Barnes Neville Wallis, British scientist, engineer and inventor
Deaths
1802 – Jurij Vega, Slovenian mathematician and physicist
1877 – Hermann Grassmann, German mathematician and physicist
1951 – Hans Cloos, German geologist
1976 – Lavoslav Ružička, Croatian chemist and Nobel Prize laureate