1640 in science
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The year 1640 in science and technology involved some significant events.
Contents |
[edit] Botany
- John Parkinson publishes Theatrum Botanicum:The Theater of Plants, or, An Herbal of a Large Extent.[1]
[edit] Exploration
- The Cape Verde Island of Sal is discovered, originally named "Llana" (meaning "flat").
[edit] 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 evenly 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.
[edit] 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.
[edit] Births
- April 1 - Georg Mohr, Danish mathematician (d. 1697)
- December 13 (bapt.) - Robert Plot, English naturalist and chemist (d. 1696)
[edit] Deaths
- December 22 - Jean de Beaugrand, French mathematician (b. c.1584)
[edit] 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 14 May 2011. http://web.archive.org/web/20110514013555/http://www.csdl.tamu.edu/FLORA/cushing/Parkin1.htm. Retrieved 2011-04-01.
