The temperature on September 26, 1878 was about 14.9 °C. The air pressure was 2 kgf/m2 and came mainly from the west-northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 64%. Source: KNMI
In The Netherlands , there was from November 3, 1877 to August 20, 1879 the cabinet Kappeijne van de Coppello, with Mr. J. Kappeijne van de Coppello (liberaal) as prime minister.
January 4 » Russo-Turkish War (1877–78): Sofia is liberated from Ottoman rule and designated the capital of Liberated Bulgaria.
February 18 » John Tunstall is murdered by outlaw Jesse Evans, sparking the Lincoln County War in Lincoln County, New Mexico.
February 22 » In Utica, New York, Frank Woolworth opens the first of many of five-and-dime Woolworth stores.
March 24 » The British frigate HMSEurydice sinks, killing more than 300.
July 1 » Canada joins the Universal Postal Union.
October 15 » The Edison Electric Light Company begins operation.
Day of marriage April 19, 1912
The temperature on April 19, 1912 was between 0.6 °C and 17.9 °C and averaged 10.2 °C. There was 11.1 hours of sunshine (79%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Gert Pieters, "Family tree Koops", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koops/I848.php : accessed January 8, 2026), "Harm de Roo (1878-< 1930)".
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