The temperature on May 20, 1880 was about 11.5 °C. There was 0.2 mm of rain. The air pressure was 3 kgf/m2 and came mainly from the northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 93%. Source: KNMI
In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
February 13 » Thomas Edison observes Thermionic emission.
May 13 » In Menlo Park, New Jersey, Thomas Edison performs the first test of his electric railway.
September 1 » The army of Mohammad Ayub Khan is routed by the British at the Battle of Kandahar, ending the Second Anglo-Afghan War.
September 16 » The Cornell Daily Sun prints its first issue in Ithaca, New York. The Sun is the United States' oldest, continuously-independent college daily.
November 11 » Australian bushranger Ned Kelly is hanged at Melbourne Gaol.
December 16 » Outbreak of the First Boer War between the Boer South African Republic and the British Empire.
Day of death August 1, 1947
The temperature on August 1, 1947 was between 9.8 °C and 23.4 °C and averaged 17.3 °C. There was 13.2 hours of sunshine (85%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
March 8 » Thirteen thousand troops of the Republic of China Army arrive in Taiwan after the February 28 Incident and launch crackdowns which kill thousands of people, including many elites. This turns into a major root of the Taiwan independence movement.
April 9 » United Nations Security Council Resolution 22 relating to Corfu Channel incident is adopted.
April 28 » Thor Heyerdahl and five crew mates set out from Peru on the Kon-Tiki to demonstrate that Peruvian natives could have settled Polynesia.
July 6 » The AK-47 goes into production in the Soviet Union.
October 22 » The Kashmir conflict between India and Pakistan begins, having started just after the partition of India.
December 2 » Jerusalem Riots of 1947: Riots break out in Jerusalem in response to the United Nations Partition Plan for Palestine.
When copying data from this family tree, please include a reference to the origin: J.J. Top, "Family tree Familie Top", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-top/I426.php : accessed February 19, 2026), "Roelfina de Graaf (1880-1947)".
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