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Physicist Augustin Fresnel reads a memoir on optical rotation to the French Academy of Sciences, reporting that when polarized light is "depolarized" by a Fresnel rhomb, its properties are preserved in any subsequent passage through an optically-rotating crystal or liquid.
The Kalmar Union is formed under the rule of Margaret I of Denmark.
The South African College is founded in Cape Town, later separating into the University of Cape Town and the South African College Schools.
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