The temperature on July 15, 1861 was about 23.6 °C. There was 0.1 mm of rain. The air pressure was 2.5 kgf/m2 and came mainly from the south-southeast. The airpressure was 75 cm mercury. The atmospheric humidity was 62%. Source: KNMI
From February 23, 1860 till March 14, 1861 the Netherlands had a cabinet Van Hall - Van Heemstra with the prime ministers Mr. F.A. baron Van Hall (conservatief-liberaal) and Mr. S. baron Van Heemstra (liberaal).
From March 14, 1861 till January 31, 1862 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Loudon with the prime ministers Mr. J.P.P. baron Van Zuijlen van Nijevelt (conservatief-liberaal) and Mr. J. Loudon (liberaal).
March 4 » The first national flag of the Confederate States of America (the "Stars and Bars") is adopted.
August 6 » Britain imposes the Lagos Treaty of Cession to suppress slavery in what is now Nigeria.
August 19 » First ascent of Weisshorn, fifth highest summit in the Alps.
September 3 » American Civil War: Confederate General Leonidas Polk invades neutral Kentucky, prompting the state legislature to ask for Union assistance.
November 28 » American Civil War: The Confederate States of America accept a rival state government's pronouncement that declares Missouri to be the 12th state of the Confederacy.
December 10 » Forces led by Nguyễn Trung Trực, an anti-colonial guerrilla leader in southern Vietnam, sink the French lorcha L'Esperance.
Day of death April 6, 1939
The temperature on April 6, 1939 was between 3.3 °C and 8.1 °C and averaged 6.5 °C. There was 5.9 mm of rain during 3.2 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
April 30 » NBC inaugurates its regularly scheduled television service in New York City, broadcasting President Franklin D. Roosevelt's N.Y. World's Fair opening day ceremonial address.
July 28 » The Sutton Hoo helmet is discovered.
September 2 » World War II: Following the start of the invasion of Poland the previous day, the Free City of Danzig (now Gdańsk, Poland) is annexed by Nazi Germany.
September 4 » World War II: William J. Murphy commands the first Royal Air Force attack on Germany.
October 15 » The New York Municipal Airport (later renamed LaGuardia Airport) is dedicated.
November 30 » Winter War: Soviet forces cross the Finnish border in several places and bomb Helsinki and several other Finnish cities, starting the war.
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/I124876.php : accessed October 14, 2026), "Douwe Koopmans (1861-1939)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.