In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
January 17 » A British force defeats a large Dervish army at the Battle of Abu Klea in the Sudan.
February 18 » Adventures of Huckleberry Finn by Mark Twain is published in the United States.
August 29 » Gottlieb Daimler patents the world's first internal combustion motorcycle, the Reitwagen.
September 2 » Rock Springs massacre: In Rock Springs, Wyoming, 150 white miners, who are struggling to unionize so they could strike for better wages and work conditions, attack their Chinese fellow workers killing 28, wounding 15 and forcing several hundred more out of town.
September 6 » Eastern Rumelia declares its union with Bulgaria, thus accomplishing Bulgarian unification.
November 28 » Bulgarian victory in the Serbo-Bulgarian War preserves the Unification of Bulgaria.
Day of marriage January 4, 1911
The temperature on January 4, 1911 was between 0.4 °C and 2.1 °C and averaged 1.3 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
March 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
May 31 » The RMS Titanic is launched in Belfast, Northern Ireland.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
Day of death December 19, 1961
The temperature on December 19, 1961 was between -9.9 °C and 1.1 °C and averaged -4.1 °C. There was 0.3 mm of rain during 0.6 hours. There was 6.2 hours of sunshine (80%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the ??. Source: KNMI
May 1 » The Prime Minister of Cuba, Fidel Castro, proclaims Cuba a socialist nation and abolishes elections.
May 16 » Park Chung-hee leads a coup d'état to overthrow the Second Republic of South Korea.
May 31 » In Moscow City Court, the Rokotov–Faibishenko show trial begins, despite the Khrushchev Thaw to reverse Stalinist elements in Soviet society.
August 1 » U.S. Defense Secretary Robert McNamara orders the creation of the Defense Intelligence Agency (DIA), the nation's first centralized military espionage organization.
September 12 » The African and Malagasy Union is founded.
December 31 » RTÉ, Ireland's state broadcaster, launches its first national television service.
When copying data from this family tree, please include a reference to the origin: Marieke Cooper, "Family tree Cooper, Kooper, Oostwal, Robert, Ooteman en Blokland", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-cooper/I3585.php : accessed February 4, 2026), "Arien Slagter (1885-1961)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.