The temperature on October 1, 1911 was between 5.2 °C and 14.1 °C and averaged 9.6 °C. There was 12.7 mm of rain. There was 5.1 hours of sunshine (44%). The average windspeed was 6 Bft (strong wind) and was prevailing from the north-northwest. Source: KNMI
January 12 » The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
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.
September 7 » French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum.
Day of death July 12, 1926
The temperature on July 12, 1926 was between 11.1 °C and 24.6 °C and averaged 18.8 °C. There was 9.6 hours of sunshine (58%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
March 15 » The dictator Theodoros Pangalos is elected President of Greece without opposition.
April 6 » Varney Airlines makes its first commercial flight (Varney is the root company of United Airlines).
May 4 » The United Kingdom general strike begins.
May 9 » Admiral Richard E. Byrd and Floyd Bennett claim to have flown over the North Pole (later discovery of Byrd's diary appears to cast some doubt on the claim.)
September 25 » The international Convention to Suppress the Slave Trade and Slavery is first signed.
December 17 » Antanas Smetona assumes power in Lithuania as the 1926 coup d'état is successful.
When copying data from this family tree, please include a reference to the origin: Eva Drenth, "Family tree Diverse", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-drenth/I17718.php : accessed January 26, 2026), "Arij Heijkoop (1911-1926)".
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.