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Did you mean: earby or eagle or earth or emily or silence or scene or 191-2 or 1914 or 191d or 191. or 1917

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Total number of records: 1

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SubjectCount
refraction, double1
wave theory of light1

Count of People and organisations

People and organisationsCount
Huygens, Christiaan (1629-1695)1
Thompson, Silvanus P (1851-1916)1