The temperature on December 26, 1870 was about -5.5 °C. The air pressure was 4 kgf/m2 and came mainly from the northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 71%. Source: KNMI
From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
January 23 » In Montana, U.S. cavalrymen kill 173 Native Americans, mostly women and children, in what becomes known as the Marias Massacre.
March 16 » The first version of the overture fantasy Romeo and Juliet by Tchaikovsky receives its première performance.
June 22 » The United States Department of Justice is created by the U.S. Congress.
July 1 » The United States Department of Justice formally comes into existence.
August 6 » Franco-Prussian War: The Battle of Spicheren is fought, resulting in a Prussian victory.
October 27 » Franco-Prussian War: Marshal Bazaine surrenders to Prussian forces at the conclusion of the Siege of Metz along with 140,000 French soldiers.
Day of marriage April 20, 1898
The temperature on April 20, 1898 was about 10.2 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 62%. Source: KNMI
February 15 » The battleship USSMaine explodes and sinks in Havana harbor in Cuba, killing 274. This event leads the United States to declare war on Spain.
April 20 » U.S. President William McKinley signed a joint resolution to Congress for declaration of war against Spain, beginning the Spanish–American War.
April 21 » Spanish–American War: The United States Navy begins a blockade of Cuban ports. When the U.S. Congress issued a declaration of war on April 25, it declared that a state of war had existed from this date.
July 7 » US President William McKinley signs the Newlands Resolution annexing Hawaii as a territory of the United States.
October 1 » The Vienna University of Economics and Business Administration is founded under the name k.u.k. Exportakademie.
November 10 » Beginning of the Wilmington insurrection of 1898, the only instance of a municipal government being overthrown in United States history.
Day of death December 14, 1950
The temperature on December 14, 1950 was between -4.1 °C and 0.9 °C and averaged -0.7 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I4263.php : accessed January 15, 2026), "Jan Valkering (1870-1950)".
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