The temperature on December 16, 1887 was about 8.8 °C. There was 0.2 mm of rain. The air pressure was 101 kgf/m2 and came mainly from the south-southwest. The airpressure was 75 cm mercury. The atmospheric humidity was 95%. 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.
April 4 » Argonia, Kansas elects Susanna M. Salter as the first female mayor in the United States.
April 10 » On Easter Sunday, Pope Leo XIII authorizes the establishment of the Catholic University of America.
June 8 » Herman Hollerith applies for US patent #395,781 for the 'Art of Compiling Statistics', which was his punched card calculator.
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.
July 26 » Publication of the Unua Libro, founding the Esperanto movement.
November 11 » August Spies, Albert Parsons, Adolph Fischer and George Engel are executed as a result of the Haymarket affair.
Day of marriage May 31, 1911
The temperature on May 31, 1911 was between 14.1 °C and 26.0 °C and averaged 20.4 °C. There was 13.3 hours of sunshine (81%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
December 27 » "Jana Gana Mana", the national anthem of India, is first sung in the Calcutta Session of the Indian National Congress.
When copying data from this family tree, please include a reference to the origin: N.P.P. Sies, "Family tree Sies", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-sies/I19084.php : accessed January 29, 2026), "Marcus Velt (1887-????)".
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