The temperature on May 17, 1866 was about 13.1 °C. The air pressure was 1.5 kgf/m2 and came mainly from the north-northwest. The airpressure was 77 cm mercury. The atmospheric humidity was 50%. Source: KNMI
In The Netherlands , there was from February 1, 1862 to February 10, 1866 the cabinet Thorbecke II, with Mr. J.R. Thorbecke (liberaal) as prime minister.
In The Netherlands , there was from February 10, 1866 to June 1, 1866 the cabinet Fransen van de Putte, with I.D. Fransen van de Putte (liberaal) as prime minister.
From June 1, 1866 till June 4, 1868 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Heemskerk with the prime ministers Mr. J.P.J.A. graaf Van Zuijlen van Nijevelt (AR) and Mr. J. Heemskerk Azn. (conservatief).
February 16 » Spencer Compton Cavendish, Marquess of Hartington becomes British Secretary of State for War.
February 21 » Lucy Hobbs Taylor becomes the first American woman to graduate from dental school.
May 1 » The Memphis Race Riots begin. In three days time, 46 blacks and two whites were killed. Reports of the atrocities influenced passage of the Fourteenth Amendment to the United States Constitution.
May 5 » Memorial Day first celebrated in United States at Waterloo, New York.
June 2 » The Fenians defeat Canadian forces at Ridgeway and Fort Erie, but the raids end soon after.
June 7 » One thousand eight hundred Fenian raiders are repelled back to the United States after looting and plundering the Saint-Armand and Frelighsburg areas of Canada East.
Day of death February 15, 1911
The temperature on February 15, 1911 was between -2.8 °C and 7.2 °C and averaged 2.0 °C. There was 0.2 mm of rain. There was 3.4 hours of sunshine (34%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
January 12 » The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
January 15 » Palestinian Arabic-language Falastin newspaper founded.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
October 24 » Orville Wright remains in the air nine minutes and 45 seconds in a glider at Kill Devil Hills, North Carolina.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
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/I11580.php : accessed February 2, 2026), "Hendricus Boon (1866-1911)".
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