Template:Selected anniversaries/February 22: Difference between revisions

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||1819: By the Adams–Onís Treaty, Spain sells Florida to the United States for five million U.S. dollars.
||1819: By the Adams–Onís Treaty, Spain sells Florida to the United States for five million U.S. dollars.


||1824: Pierre Janssen born ... astronomer and mathematician.
||1824: Pierre Jules César Janssen born ... astronomer who, along with English scientist Joseph Norman Lockyer, is credited with discovering the gaseous nature of the solar chromosphere, and with some justification the element helium. Pic.


||1842: Leonhard Sohncke born ... mathematician who classified the 65 space groups in which chiral crystal structures form, called Sohncke groups. Pic.
||1842: Leonhard Sohncke born ... mathematician who classified the 65 space groups in which chiral crystal structures form, called Sohncke groups. Pic.

Revision as of 10:48, 12 December 2018