Tag Archives: Newton

today’s birthday: Louis Braille (1809)


Louis Braille (1809)

Having lost his sight at the age of three following an accident, Braille went on to attend the National Institute for Blind Youth in Paris.

Braille

Braille (Photo credit: Wikipedia)

While there, he began developing a system of raised dots representing letters to facilitate reading and writing among the visually impaired. This evolved into Braille, a writing system for the blind, which was later extended to include notations for mathematics and music. Braille’s invention was inspired by another writing system designed for what purpose? More… Discuss

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this day in the yesteryear: Philosophiae Naturalis Principia Mathematica Published (1687)


 

A page from the 1726 edition of the Principia.
A page from the 1726 edition of the Principia. (Photo credit: Wikipedia)

Philosophiae Naturalis Principia Mathematica Published (1687)

Newton’s Principia represents one of the greatest milestones in the history of science and marked the beginning of the modern period of mechanics and astronomy. The text includes Newton’s three famous laws of motion, treatises on dynamics and fluid motion, the unification of terrestrial and celestial mechanics under the principle of gravitation, and an explanation of Kepler’s laws of planetary motion. Principia grew out of Newton’s correspondence with what famous astronomer? More… Discuss

Title page of 'Principia', first edition (1687).

Title page of ‘Principia’, first edition (1687). (Photo credit: Wikipedia)