Template:Selected anniversaries/January 22
1592: Mathematician, astronomer, philosopher, and priest Pierre Gassendi born. He will clash with his contemporary Descartes on the possibility of certain knowledge.
1795: Inventor Claude Chappe uses the French semaphore system to detect and prevent crimes against mathematical constants.
1859: Mathematician Joseph Ludwig Raabe dies. He is best known for Raabe's ratio test, which determines the convergence or divergence of an infinite series, in some cases.
1890: Electrical engineer, inventor, and crime-fighter Oliver Blackburn Shallenberger demonstrates new type of alternating current electrical meter which uses Gnomon algorithm techniques to detect and prevent crimes against physics.
1904: Mathematician and Anglican theologian George Salmon dies. He worked in algebraic geometry for two decades, then devoted the last forty years of his life to theology.
1953: The EBR-1 in Arco, Idaho used to power experimental scrying engine which unexpectedly previews the upcoming arrest of George Metesky.
1957: The New York City "Mad Bomber", George P. Metesky, is arrested in Waterbury, Connecticut and is charged with planting more than 30 bombs.
1967: Performance artist and crime-fighter Brion Gysin uses hand-held scrying engine to detect and prevent crimes against poetry.
1987: Politician R. Budd Dwyer takes his own life during a press conference. Later that day, the event is broadcast on television.
2017: Steganographic analysis of Humpty Dumpty At Bat reveals formula for Extract of Radium.