The temperature on April 30, 1888 was about 17.7 °C. The air pressure was 14 kgf/m2 and came mainly from the south-southeast. The airpressure was 75 cm mercury. The atmospheric humidity was 57%. 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.
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.
January 13 » The National Geographic Society is founded in Washington, D.C.
March 20 » The premiere of the very first Romani language operetta is staged in Moscow, Russia.
May 13 » With the passage of the Lei Áurea ("Golden Law"), Empire of Brazil abolishes slavery.
May 16 » Nikola Tesla delivers a lecture describing the equipment which will allow efficient generation and use of alternating currents to transmit electric power over long distances.
August 21 » The first successful adding machine in the United States is patented by William Seward Burroughs.
August 31 » Mary Ann Nichols is murdered. She is the first of Jack the Ripper's confirmed victims.
Day of death June 11, 1977
The temperature on June 11, 1977 was between 8.5 °C and 20.1 °C and averaged 14.3 °C. There was 0.6 mm of rain during 0.4 hours. There was 10.0 hours of sunshine (60%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south. 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.
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
January 18 » Scientists identify a previously unknown bacterium as the cause of the mysterious Legionnaires' disease.
March 23 » The first of The Nixon Interviews (12 will be recorded over four weeks) is videotaped with British journalist David Frost interviewing former United States President Richard Nixon about the Watergate scandal and the Nixon tapes.
April 5 » The US Supreme Court rules that congressional legislation that diminished the size of the Sioux people's reservation thereby destroyed the tribe's jurisdictional authority over the area in Rosebud Sioux Tribe v. Kneip.
September 7 » The Torrijos–Carter Treaties between Panama and the United States on the status of the Panama Canal are signed. The United States agrees to transfer control of the canal to Panama at the end of the 20th century.
September 13 » General Motors introduces Diesel engine, with Oldsmobile Diesel engine, in the Delta 88, Oldsmobile 98, and Oldsmobile Custom Cruiser models amongst others.
November 6 » The Kelly Barnes Dam, located above Toccoa Falls College near Toccoa, Georgia, fails, killing 39.
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/I22588.php : accessed October 25, 2026), "Jan Vaatstra (1888-1977)".
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