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How was Samuel Pepys connected to Isaac Newton’s Principia Mathematica?

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Diarist Samuel Pepys — Samuel Pepys Samuel Pepys, oil painting by John Hayls, 1666; in the National Portrait Gallery, London.

Samuel Pepys was connected to Sir Isaac Newton’s Philosophiae Naturalis Principia Mathematica through his role as president of the Royal Society. During his tenure, Pepys placed his official imprimatur on the title page of the work, which is widely considered England’s greatest scientific achievement.1