Valentine Ball
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Robert Stawell Ball
Royal Institution Christmas Lectures
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Dunsink Observatory
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Ascension Parish Burial Ground
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Institute of Astronomy, Cambridge
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Screw theory
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University Philosophical Society
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Robert Ball
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E. T. Whittaker
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Lowndean Professor of Astronomy and Geometry
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John Louis Emil Dreyer
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Arthur Eddington
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Sir Robert Ball
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Sir Robert Stawell Ball
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