1640 in science
| |||
|---|---|---|---|
| +... |
| 1640 in science |
|---|
| Fields |
| Technology |
| Social sciences |
| Paleontology |
| Extraterrestrial environment |
| Terrestrial environment |
| Other/related |
The year 1640 in science and technology involved some significant events.
Botany
[edit]- John Parkinson publishes Theatrum Botanicum:The Theater of Plants, or, An Herbal of a Large Extent.[1]
Mathematics
[edit]- The 16-year-old Blaise Pascal demonstrates the properties of the hexagrammum mysticum in his Essai pour les coniques which he sends to Mersenne.
- October 18 – Fermat states his "little theorem" in a letter to Frénicle de Bessy: if p is a prime number, then for any integer a, a p − a will be divisible by p.
- December 25 – Fermat claims a proof of the theorem on sums of two squares in a letter to Mersenne ("Fermat's Christmas Theorem"): an odd prime p is expressible as the sum of two squares.
Technology
[edit]- The micrometer is developed.
- A form of bayonet is invented; in later years it will gradually replace the pike.
- The reticle telescope is developed and initiates the birth of sharpshooting.
Births
[edit]- April 1 – Georg Mohr, Danish mathematician (died 1697)
- December 13 (bapt.) – Robert Plot, English naturalist and chemist and illustrator of the first dinosaur fossil (died 1696)
- Elias Tillandz, Swedish physician and botanist in Finland (died 1693)
Deaths
[edit]- December 22 – Jean de Beaugrand, French mathematician (born c. 1584)
References
[edit]- ^ Tran, Linh. "Theatrum Botanicum: The Theater of Plants, or, An Herbal of a Large Extent". Texas A&M University Bioinformatics Working Group. Archived from the original on November 5, 2008. Retrieved 2011-04-01.