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Huygens, Christiaan, 1629-1695 (2)

The celestial worlds discover'd : $b or, conjectures concerning the inhabitants, plants and productions of the worlds in the planets [electronic resource] / Christiaan Huygens

Treatise on light : $b In which are explained the causes of that which occurs in reflexion, and in refraction and particularly in the strange refraction of Iceland crystal [electronic resource] / Christiaan Huygens

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