On This Day

Historical Events in October 1675

  • Oct 4 Dutch mathematician Christiaan Huygens patents the pocket watch

Event of interestEvent of Interest

Oct 29 Gottfried Wilhelm Leibniz makes the first use of the long s, ∫, for integral, helping discover integral and differential calculus

Philosopher and Mathematician Gottfried Wilhelm Leibniz
Philosopher and Mathematician
Gottfried Wilhelm Leibniz