The temperature on April 18, 1887 was about 13.2 °C. The air pressure was 14 kgf/m2 and came mainly from the west. The airpressure was 77 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 20 » The United States Senate allows the Navy to lease Pearl Harbor as a naval base.
February 2 » In Punxsutawney, Pennsylvania the first Groundhog Day is observed.
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 11 » August Spies, Albert Parsons, Adolph Fischer and George Engel are executed as a result of the Haymarket affair.
Day of death June 7, 1952
The temperature on June 7, 1952 was between 6.2 °C and 17.0 °C and averaged 12.4 °C. There was 2.0 mm of rain during 3.5 hours. There was 9.6 hours of sunshine (58%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 6 » Elizabeth II becomes Queen of the United Kingdom and her other Realms and Territories and Head of the Commonwealth upon the death of her father, George VI. At the exact moment of succession, she was in a tree house at the Treetops Hotel in Kenya.
February 15 » King George VI of the United Kingdom is buried in St George's Chapel, Windsor Castle.
April 8 » U.S. President Harry Truman calls for the seizure of all domestic steel mills in an attempt to prevent the 1952 steel strike.
May 2 » A De Havilland Comet makes the first jetliner flight with fare-paying passengers, from London to Johannesburg.
May 13 » The Rajya Sabha, the upper house of the Parliament of India, holds its first sitting.
August 12 » The Night of the Murdered Poets: Thirteen prominent Jewish intellectuals are murdered in Moscow, Russia, Soviet Union.
When copying data from this family tree, please include a reference to the origin: Hermannus Wulff, "Family tree Wolf-Wulff", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-wolf-wulff/I130.php : accessed March 1, 2026), "Jan Bakkers (1887-1952)".
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