1640 in science
The year 1640 in science and technology involved some significant events.
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Botany
- John Parkinson publishes Theatrum Botanicum:The Theater of Plants, or, An Herbal of a Large Extent.[1]
Mathematics
- 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
- 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
- April 1 – Georg Mohr, Danish mathematician (died 1697)
- December 13 (bapt.) – Robert Plot, English naturalist and chemist (died 1696)
- Elias Tillandz, Swedish physician and botanist in Finland (died 1693)
Deaths
- December 22 – Jean de Beaugrand, French mathematician (born c. 1584)
gollark: Well, it's pretty known that they do go around intercepting lots of stuff. There are many problems with this:- having private data like your internet traffic stored somewhere is kind of bad in itself.- if it's not abused yet it's basically only a matter of time.- there's no transparency anywhere and even a system of secret courts to judge things- it may help slightly to stop terrorists (no transparency so we can't check really) but is just a massive breach of privacy
gollark: GNU+Windows?
gollark: We'll see who's a fool when I backtrace your IP with Visual Basic!
gollark: That's one broken printer.
gollark: ... wait, what?
References
- 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.
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