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Isaac Newton (1642–1727)

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Newton Project, Online. Opticks, Front Matter. Opticks, Book 1, Part 1. Opticks, Book 1, Part 2. Opticks, Book 2, Part 1. Opticks, Book 2, Part 2. Opticks, Book 2, Part 3. Opticks, Book 2, Part 4. Opticks, Book 3. Principia Mathematica.