1691 in science

Overview of the events of 1691 in science

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1691 in science

1690

1692

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* Dinosaurs' extinction

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

## Biology

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* Italian Jesuit scholar Filippo Bonanni publishes the results of his microscopic observations of invertebrates in Observationes circa Viventia, quae in Rebus non-Viventibus.

## Mathematics

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* Gottfried Leibniz discovers the technique of separation of variables for ordinary differential equations.
* Michel Rolle invents Rolle's theorem.

## Medicine

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* Anton Nuck's Adenographia curiosa et uteri foeminei anatome nova is published at Leiden, including a description of the canal of Nuck[1] and a demonstration that the embryo is derived from the ovary and not the sperm.[2]

## Technology

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* Edmond Halley devises a diving bell.[3]
* In music, the "equal temperament scale" used in modern music is developed by organist Andreas Werckmeister.

## Births

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* November 18 – Mårten Triewald, Swedish mechanical engineer (died 1747)

## Deaths

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* January 17 – Richard Lower, English physician who performed the first direct blood transfusion (born 1631)
* December 31 – Robert Boyle, Anglo-Irish chemist (born 1627)[4]

## References

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1. ^ Enersen, Ole Daniel. "Nuck's canal". Whonamedit?. Retrieved 2012-10-15.
2. ^ Speert, Harold (1958). Obstetric and Gynecologic Milestones. New York: Macmillan. pp. 95–101.95-101&rft.pub=Macmillan&rft.date=1958&rft.aulast=Speert&rft.aufirst=Harold&rfr_id=info:sid/en.wikipedia.org:1691+in+science" class="Z3988">
3. ^ Edmonds, Carl; Lowry, C.; Pennefather, John. "History of diving". South Pacific Underwater Medicine Society Journal. 5 (2). Archived from the original on 2010-10-14. Retrieved 2011-06-17.
4. ^ "Robert Boyle | Biography, Contributions, Works, & Facts". Encyclopedia Britannica. Retrieved 4 December 2020.

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