March 4 » John Flamsteed is appointed the first Astronomer Royal of England.
August 11 » Franco-Dutch War: Forces of the Holy Roman Empire defeat the French in the Battle of Konzer Brücke.
October 29 » Leibniz makes the first use of the long s (∫) as a symbol of the integral in calculus.
November 11 » Gottfried Leibniz demonstrates integral calculus for the first time to find the area under the graph of y = ƒ(x).
December 11 » Antonio de Vea expedition enters San Rafael Lake in western Patagonia.
December 19 » The Great Swamp Fight, a pivotal battle in King Philip's War, gives the English settlers a bitterly won victory.
The Family tree Dijkstra publication was prepared by wijlen Jelke Dijkstra (as indicated in the digital, genealogical legacy, this publication remains online, contact is not possible).
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