March 1 » Henri Becquerel discovers radioactive decay.
May 26 » Charles Dow publishes the first edition of the Dow Jones Industrial Average.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
July 9 » William Jennings Bryan delivers his Cross of Gold speech advocating bimetallism at the 1896 Democratic National Convention in Chicago.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
December 17 » Pittsburgh, Pennsylvania's Schenley Park Casino, which was the first multi-purpose arena with the technology to create an artificial ice surface in North America, is destroyed in a fire.
Day of death February 28, 1968
The temperature on February 28, 1968 was between -1.9 °C and 2.3 °C and averaged 0.2 °C. There was 0.3 hours of sunshine (3%). The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
January 22 » Operation Igloo White, a US electronic surveillance system to stop communist infiltration into South Vietnam begins installation.
February 1 » The New York Central Railroad and the Pennsylvania Railroad are merged to form Penn Central Transportation.
March 17 » As a result of nerve gas testing by the U.S. Army Chemical Corps in Skull Valley, Utah, over 6,000 sheep are found dead.
October 20 » Former First Lady Jacqueline Kennedy marries Greek shipping tycoon Aristotle Onassis.
October 31 » Vietnam War October surprise: Citing progress with the Paris peace talks, US President Lyndon B. Johnson announces to the nation that he has ordered a complete cessation of "all air, naval, and artillery bombardment of North Vietnam" effective November 1.
December 10 » Japan's biggest heist, the still-unsolved "300 million yen robbery", is carried out in Tokyo.
When copying data from this family tree, please include a reference to the origin: Louis Kramer, "Kramer Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/kramer_stamboom/I600250.php : accessed January 21, 2026), "Roelofke Hiemstra (1896-1968)".
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