The temperature on July 18, 1873 was about 23.2 °C. There was 0.1 mm of rain. The air pressure was 9 kgf/m2 and came mainly from the west-southwest. The airpressure was 76 cm mercury. The atmospheric humidity was 65%. Source: KNMI
From July 6, 1872 till August 27, 1874 the Netherlands had a cabinet De Vries - Fransen van de Putte with the prime ministers Mr. G. de Vries Azn. (liberaal) and I.D. Fransen van de Putte (liberaal).
March 22 » Before the Société pour L'Encouragement à l'Industrie, brothers Auguste and Louis Lumière demonstrate movie film technology publicly for the first time.
April 8 » In Pollock v. Farmers' Loan & Trust Co. the Supreme Court of the United States declares unapportioned income tax to be unconstitutional.
May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
October 4 » Horace Rawlins wins the first U.S. Open Men's Golf Championship.
October 8 » Korean Empress Myeongseong is assassinated by Japanese infiltrators.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
Day of death March 17, 1950
The temperature on March 17, 1950 was between 8.1 °C and 11.2 °C and averaged 9.7 °C. There was 12.4 mm of rain during 9.1 hours. The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-southwest. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
March 7 » Cold War: The Soviet Union issues a statement denying that Klaus Fuchs served as a Soviet spy.
June 3 » Herzog and Lachenal of the French Annapurna expedition become the first climbers to reach the summit of an 8,000-metre peak.
June 27 » The United States decides to send troops to fight in the Korean War.
September 23 » Korean War: The Battle of Hill 282 is the first US friendly-fire incident on British military personnel since World War II.
October 11 » CBS's field-sequential color system for television is the first to be licensed for broadcast by the U.S. Federal Communications Commission.
December 25 » The Stone of Scone, traditional coronation stone of British monarchs, is taken from Westminster Abbey by Scottish nationalist students. It later turns up in Scotland on April 11, 1951.
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/I156808.php : accessed October 16, 2026), "Roelof Hamersma (1873-1950)".
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