The temperature on July 19, 1887 was about 16.5 °C. The air pressure was 2 kgf/m2 and came mainly from the north-northwest. The airpressure was 77 cm mercury. The atmospheric humidity was 60%. Source: KNMI
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 20 » The United States Senate allows the Navy to lease Pearl Harbor as a naval base.
June 8 » Herman Hollerith applies for US patent #395,781 for the 'Art of Compiling Statistics', which was his punched card calculator.
June 23 » The Rocky Mountains Park Act becomes law in Canada creating the nation's first national park, Banff National Park.
July 6 » David Kalākaua, monarch of the Kingdom of Hawaii, is forced to sign the Bayonet Constitution, which transfers much of the king's authority to the Legislature of the Kingdom of Hawaii.
November 9 » The United States receives rights to Pearl Harbor, Hawaii.
November 11 » August Spies, Albert Parsons, Adolph Fischer and George Engel are executed as a result of the Haymarket affair.
Day of death June 25, 1951
The temperature on June 25, 1951 was between 10.3 °C and 20.0 °C and averaged 15.1 °C. There was 0.1 mm of rain during 0.4 hours. There was 8.2 hours of sunshine (49%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. 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).
In The Netherlands , there was from March 15, 1951 to September 2, 1952 the cabinet Drees I, with Dr. W. Drees (PvdA) as prime minister.
February 7 » Korean War: More than 700 suspected communist sympathizers are massacred by South Korean forces.
February 13 » Korean War: Battle of Chipyong-ni, which represented the "high-water mark" of the Chinese incursion into South Korea, commences.
February 27 » The Twenty-second Amendment to the United States Constitution, limiting Presidents to two terms, is ratified.
March 31 » Remington Rand delivers the first UNIVAC I computer to the United States Census Bureau.
October 15 » Mexican chemist Luis E. Miramontes completes the synthesis of norethisterone, the basis of an early oral contraceptive.
November 15 » Greek resistance leader Nikos Beloyannis, along with 11 resistance members, is sentenced to death by the court-martial.
Day of burial June 30, 1951
The temperature on June 30, 1951 was between 8.0 °C and 16.2 °C and averaged 12.7 °C. There was 2.6 hours of sunshine (16%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. 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).
In The Netherlands , there was from March 15, 1951 to September 2, 1952 the cabinet Drees I, with Dr. W. Drees (PvdA) as prime minister.
January 27 » Nuclear testing at the Nevada Test Site begins with Operation Ranger.
February 9 » Korean War: The two-day Geochang massacre begins as a battalion of the 11th Division of the South Korean Army kills 719 unarmed citizens in Geochang, in the South Gyeongsang district of South Korea
March 6 » Cold War: The trial of Ethel and Julius Rosenberg begins.
March 31 » Remington Rand delivers the first UNIVAC I computer to the United States Census Bureau.
April 11 » The Stone of Scone, the stone upon which Scottish monarchs were traditionally crowned, is found on the site of the altar of Arbroath Abbey. It had been taken by Scottish nationalist students from its place in Westminster Abbey.
July 4 » William Shockley announces the invention of the junction transistor.
When copying data from this family tree, please include a reference to the origin: Jan De Backer, "Family tree De Backer - Evers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-backer-evers/I586618.php : accessed February 28, 2026), "Henri Jozef Clement Knapen (1887-1951)".
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