The temperature on June 17, 1889 was about 18.1 °C. The air pressure was 6 kgf/m2 and came mainly from the north-northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 66%. Source: KNMI
January 8 » Herman Hollerith is issued US patent #395,791 for the 'Art of Applying Statistics' — his punched card calculator.
January 22 » Columbia Phonograph is formed in Washington, D.C.
February 9 » US president Grover Cleveland signs a bill elevating the United States Department of Agriculture to a Cabinet-level agency.
June 3 » The first long-distance electric power transmission line in the United States is completed, running 14 miles (23km) between a generator at Willamette Falls and downtown Portland, Oregon.
August 4 » The Great Fire of Spokane, Washington destroys some 32 blocks of the city, prompting a mass rebuilding project.
November 23 » The first jukebox goes into operation at the Palais Royale Saloon in San Francisco.
Day of marriage February 7, 1912
The temperature on February 7, 1912 was between 4.4 °C and 9.6 °C and averaged 6.2 °C. There was 2.7 mm of rain. There was 3.3 hours of sunshine (35%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 6 » German geophysicist Alfred Wegener first presents his theory of continental drift.
January 8 » The African National Congress is founded, under the name South African Native National Congress (SANNC).
February 12 » The Xuantong Emperor, the last Emperor of China, abdicates.
April 15 » The British passenger liner RMSTitanic sinks in the North Atlantic at 2:20a.m., two hours and forty minutes after hitting an iceberg. Only 710 of 2,227 passengers and crew on board survive.
September 28 » The Ulster Covenant is signed by some 500,000 Ulster Protestant Unionists in opposition to the Third Irish Home Rule Bill.
November 2 » Bulgaria defeats the Ottoman Empire in the Battle of Lule Burgas, the bloodiest battle of the First Balkan War, which opens her way to Constantinople.
Day of death June 18, 1975
The temperature on June 18, 1975 was between 10.9 °C and 19.6 °C and averaged 15.1 °C. There was -0.1 mm of rain. There was 4.3 hours of sunshine (26%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
January 30 » The Monitor National Marine Sanctuary is established as the first United States National Marine Sanctuary.
April 30 » Fall of Saigon: Communist forces gain control of Saigon. The Vietnam War formally ends with the unconditional surrender of South Vietnamese president Dương Văn Minh.
June 5 » The United Kingdom holds its first country-wide referendum on membership of the European Economic Community (EEC).
July 27 » Mayor of Jaffna and former MP Alfred Duraiappah is shot dead.
October 22 » The Soviet unmanned space mission Venera 9 lands on Venus.
November 25 » Suriname gains independence from the Netherlands.
When copying data from this family tree, please include a reference to the origin: Dirk Ham, "Family tree Ham en Dallinga", database, Genealogy Online (https://www.genealogieonline.nl/ham-stamboom/I4604.php : accessed January 6, 2026), "Rommert Groeneveld (1889-1975)".
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