1691 in science

List of years in science (Table)
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… 1688 1689 1690 1691 1692 1693 1694 … … 1660s 1670s 1680s 1690s 1700s 1710s 1720s … … 16th century 17th century 18th century …
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The year 1691 in science and technology involved some significant events.

Astronomy

• The Hartmann Mask is invented by Christopher Scheiner.

Mathematics

• Michel Rolle invents Rolle's theorem.

Technology

• Edmond Halley devises a diving bell.
• In music, the "equal temperament scale" used in today's music is developed by organist Andreas Werkmeister.

Births

• November 18 - Mårten Triewald, Swedish mechanical engineer (d. 1747)

Deaths

• December 31 - Robert Boyle, British chemist (b. 1627)