The temperature on August 12, 1886 was about 17.9 °C. The air pressure was 10 kgf/m2 and came mainly from the west-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 73%. 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.
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 4 » Haymarket affair: A bomb is thrown at policemen trying to break up a labor rally in Chicago, United States, killing eight and wounding 60. The police fire into the crowd.
June 10 » Mount Tarawera in New Zealand erupts, killing 153 people and burying the famous Pink and White Terraces. Eruptions continue for three months creating a large, 17km long fissure across the mountain peak.
June 13 » A fire devastates much of Vancouver, British Columbia.
July 4 » The Canadian Pacific Railway's first scheduled train from Montreal arrives in Port Moody on the Pacific coast, after six days of travel.
November 30 » The Folies Bergère stages its first revue.
Day of death June 15, 1968
The temperature on June 15, 1968 was between 13.2 °C and 24.4 °C and averaged 19.0 °C. There was 11.3 hours of sunshine (68%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
April 4 » A.E.K. Athens B.C. becomes the first Greek team to win the European Basketball Cup.
May 25 » The Gateway Arch in St. Louis, Missouri, is dedicated.
May 26 » H-dagurinn in Iceland: Traffic changes from driving on the left to driving on the right overnight
June 30 » Pope Paul VI issues the Credo of the People of God.
September 15 » The Soviet Zond 5 spaceship is launched, becoming the first spacecraft to fly around the Moon and re-enter the Earth's atmosphere.
December 25 » Kilvenmani massacre: Forty-four Dalits (untouchables) are burnt to death in Kizhavenmani village, Tamil Nadu, a retaliation for a campaign for higher wages by Dalit laborers.
When copying data from this family tree, please include a reference to the origin: Peter de Groot, "Family tree De Groot en Jansen", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-groot-en-jansen/I4007.php : accessed August 8, 2025), "Martina Adriana Vromans (1886-1968)".
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