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Publication of Schwabe's discovery of the periodicity of sun-spots -- 19 May 1851 discovery of 14 Irene 29 July 1851 discovery of 15 Eunomia ---- 19 January 1851, Birth of Jacobus Cornelius Kapteyn in Barneveld, the Netherlands 12 April 1851 Birth of Edward Walter Maunder, in London, England, 3 August 1851 Birth of George Francis FitzGerald, in Dublin, Ireland 1851 Birth of Herman Frasch 1851 Death of William Nicol
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