The temperature on June 7, 1891 was about 14.5 °C. The air pressure was 7 kgf/m2 and came mainly from the north-northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 81%. Source: KNMI
In The Netherlands , there was from April 21, 1888 to August 21, 1891 the cabinet Mackay, with Mr. A. baron Mackay (AR) as prime minister.
In The Netherlands , there was from August 21, 1891 to May 9, 1894 the cabinet Van Tienhoven, with Mr. G. van Tienhoven (unie-liberaal) as prime minister.
March 3 » Shoshone National Forest is established as the first national forest in the US and world.
March 10 » Almon Strowger patents the Strowger switch, a device which led to the automation of telephone circuit switching.
April 1 » The Wrigley Company is founded in Chicago, Illinois.
May 16 » The International Electrotechnical Exhibition opens in Frankfurt, Germany, and will feature the world's first long-distance transmission of high-power, three-phase electric current (the most common form today).
August 24 » Thomas Edison patents the motion picture camera.
October 28 » The Mino–Owari earthquake is the largest inland earthquake in Japan's history.
Day of marriage April 19, 1917
The temperature on April 19, 1917 was between -1.6 °C and 7.6 °C and averaged 4.1 °C. There was 1.9 mm of rain. There was 0.9 hours of sunshine (6%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
January 11 » The Kingsland munitions factory explosion occurs as a result of sabotage.
March 2 » The enactment of the Jones–Shafroth Act grants Puerto Ricans United States citizenship.
May 19 » The Norwegian football club Rosenborg BK is founded.
June 28 » World War I: Greece joins the Allied powers.
August 30 » Vietnamese prison guards led by Trịnh Văn Cấn mutiny at the Thái Nguyên penitentiary against local French authority.
November 7 » World War I: Third Battle of Gaza ends: British forces capture Gaza from the Ottoman Empire.
Day of death May 23, 1967
The temperature on May 23, 1967 was between 8.4 °C and 16.8 °C and averaged 12.4 °C. There was 6.8 hours of sunshine (42%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
March 26 » Ten thousand people gather for one of many Central Park be-ins in New York City.
June 8 » Six-Day War: The USS Liberty incident occurs, killing 34 and wounding 171.
September 30 » The BBC Light Programme, Third Programme and Home Service are replaced with BBC Radio 2, 3 and 4 Respectively, BBC Radio 1 is also launched.
October 9 » A day after his capture, Ernesto "Che" Guevara is executed for attempting to incite a revolution in Bolivia.
November 17 » Vietnam War: Acting on optimistic reports that he had been given on November 13, U.S. President Lyndon B. Johnson tells the nation that, while much remained to be done, "We are inflicting greater losses than we're taking...We are making progress."
December 4 » Vietnam War: U.S. and South Vietnamese forces engage Viet Cong troops in the Mekong Delta.
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/I18983.php : accessed February 6, 2026), "Margaretha Petronella van Heulen (1891-1967)".
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