The temperature on April 2, 1886 was about 11.4 °C. The air pressure was 8 kgf/m2 and came mainly from the south-southeast. The airpressure was 76 cm mercury. The atmospheric humidity was 47%. 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 18 » Modern field hockey is born with the formation of The Hockey Association in England.
February 23 » Charles Martin Hall produced the first samples of aluminium from the electrolysis of aluminium oxide, after several years of intensive work. He was assisted in this project by his older sister, Julia Brainerd Hall.
May 1 » Rallies are held throughout the United States demanding the eight-hour work day, culminating in the Haymarket affair in Chicago, in commemoration of which May 1 is celebrated as International Workers' Day in many countries.
May 29 » The pharmacist John Pemberton places his first advertisement for Coca-Cola, which appeared in The Atlanta Journal.
November 27 » German judge Emil Hartwich sustains fatal injuries in a duel, which would become the background for Theodor Fontane's Effi Briest.
November 30 » The Folies Bergère stages its first revue.
Day of death June 25, 1969
The temperature on June 25, 1969 was between 13.0 °C and 17.9 °C and averaged 14.4 °C. There was 0.6 mm of rain during 1.4 hours. There was -0.1 hours of sunshine (0%). The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
April 17 » Sirhan Sirhan is convicted of assassinating Robert F. Kennedy.
April 22 » British yachtsman Sir Robin Knox-Johnston wins the Sunday Times Golden Globe Race and completes the first solo non-stop circumnavigation of the world.
June 23 » IBM announces that effective January 1970 it will price its software and services separately from hardware thus creating the modern software industry.
June 28 » Stonewall riots begin in New York City, marking the start of the Gay Rights Movement.
November 19 » Apollo program: Apollo 12 astronauts Pete Conrad and Alan Bean land at Oceanus Procellarum (the "Ocean of Storms") and become the third and fourth humans to walk on the Moon.
November 24 » Apollo program: The Apollo 12 command module splashes down safely in the Pacific Ocean, ending the second manned mission to land on the Moon.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I77346.php : accessed September 30, 2026), "Johannes de Graaf (1886-1969)".
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