1691 in science

The year 1691 in science and technology involved some significant events.

Astronomy

* The Hartmann Mask is invented by Christopher Scheiner, although most people know of it as a Hartmann Mask not a Scheiner Mask.

Exploration

Mathematics

* Michel Rolle invents Rolle's theorem.

Physics

Technology

* In music, the "equal temperament scale" used in today's music is developed by organist Andreas Werkmeister.

Births

Deaths

* December 30 - Robert Boyle, a founder of modern chemistry (* 1627)


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