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.
June 20 » The Kiel Canal, crossing the base of the Jutland peninsula and the busiest artificial waterway in the world, is officially opened.
June 28 » The United States Court of Private Land Claims rules James Reavis’s claim to Barony of Arizona is "wholly fictitious and fraudulent."
October 22 » In Paris an express train derails after overrunning the buffer stop, crossing almost 30 metres (100ft) of concourse before crashing through a wall and falling 10 metres (33ft) to the road below.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
Day of death March 17, 1965
The temperature on March 17, 1965 was between 4.5 °C and 11.2 °C and averaged 8.1 °C. There was 1.8 hours of sunshine (15%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
February 9 » The United States Marine Corps sends a MIM-23 Hawk missile battalion to South Vietnam, the first American troops in-country without an official advisory or training mission.
April 9 » Astrodome opens. First indoor baseball game is played.
June 7 » The Supreme Court of the United States hands down its decision in Griswold v. Connecticut, prohibiting the states from criminalizing the use of contraception by married couples.
July 28 » Vietnam War: U.S. President Lyndon B. Johnson announces his order to increase the number of United States troops in South Vietnam from 75,000 to 125,000.
September 30 » The Lockheed L-100, the civilian version of the C-130 Hercules, is introduced.
November 28 » Vietnam War: In response to U.S. President Lyndon B. Johnson's call for "more flags" in Vietnam, Philippine President-elect Ferdinand Marcos announces he will send troops to help fight in South Vietnam.
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/I170157.php : accessed October 23, 2026), "Frederik Hendrik Sprenger (1895-1965)".
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