April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage October 17, 1938
The temperature on October 17, 1938 was between 10.3 °C and 16.6 °C and averaged 13.4 °C. There was 6.4 mm of rain during 3.4 hours. There was 1.2 hours of sunshine (11%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
February 11 » BBC Television produces the world's first ever science fiction television programme, an adaptation of a section of the Karel Čapek play R.U.R., that coined the term "robot".
July 3 » United States President Franklin D. Roosevelt dedicates the Eternal Light Peace Memorial and lights the eternal flame at Gettysburg Battlefield.
July 28 » Hawaii Clipper disappears between Guam and Manila as the first loss of an airliner in trans-Pacific China Clipper service.
September 5 » Chile: A group of youths affiliated with the fascist National Socialist Movement of Chile are executed after surrendering during a failed coup.
October 1 » Germany annexes the Sudetenland.
December 16 » Adolf Hitler institutes the Cross of Honour of the German Mother.
Day of death June 8, 1960
The temperature on June 8, 1960 was between 7.2 °C and 21.6 °C and averaged 15.2 °C. There was 0.2 mm of rain during 0.7 hours. There was 8.3 hours of sunshine (50%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
April 13 » The United States launches Transit 1-B, the world's first satellite navigation system.
April 15 » At Shaw University in Raleigh, North Carolina, Ella Baker leads a conference that results in the creation of the Student Nonviolent Coordinating Committee, one of the principal organizations of the civil rights movement in the 1960s.
May 22 » The Great Chilean earthquake, measuring 9.5 on the moment magnitude scale, hits southern Chile, becoming the most powerful earthquake ever recorded.
July 21 » Sirimavo Bandaranaike is elected Prime Minister of Sri Lanka, becoming the world's first female head of government
October 12 » Soviet Premier Nikita Khrushchev pounds his shoe on a desk at the United Nations to protest a Philippine assertion.
November 8 » John F. Kennedy is elected as the 35th President of the United States.
When copying data from this family tree, please include a reference to the origin: Roelf Schrik, "Family tree Leemborg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-leemborg/I2913.php : accessed January 15, 2026), "Tonnis Houttuin (1897-1960)".
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