The temperature on April 2, 1886 was about 11.4 °C. The air pressure was 8 kgf/m2 and came mainly from the south-southeast. The airpressure was 76 cm mercury. The atmospheric humidity was 47%. Source: KNMI
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
March 29 » John Pemberton brews the first batch of Coca-Cola in a backyard in Atlanta.
May 8 » Pharmacist John Pemberton first sells a carbonated beverage named "Coca-Cola" as a patent medicine.
June 26 » Henri Moissan isolated elemental Fluorine for the first time.
June 30 » The first transcontinental train trip across Canada departs from Montreal, Quebec. It arrives in Port Moody, British Columbia on July 4.
July 3 » Karl Benz officially unveils the Benz Patent-Motorwagen, the first purpose-built automobile.
August 31 » The 7.0 Mw Charleston earthquake affects southeastern South Carolina with a maximum Mercalli intensity of X (Extreme). Sixty people killed with damage estimated at $5–6 million.
Day of death August 22, 1968
The temperature on August 22, 1968 was between 12.0 °C and 25.5 °C and averaged 19.3 °C. There was 8.6 hours of sunshine (60%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
January 22 » Operation Igloo White, a US electronic surveillance system to stop communist infiltration into South Vietnam begins installation.
January 30 » Vietnam War: Tet Offensive launch by forces of the Viet Cong and North Vietnamese Army against South Vietnam, the United States, and their allies.
March 7 » Vietnam War: The United States and South Vietnamese military begin Operation Truong Cong Dinh to root out Viet Cong forces from the area surrounding Mỹ Tho.
September 30 » The Boeing 747 is rolled out and shown to the public for the first time.
October 12 » Equatorial Guinea becomes independent from Spain.
December 20 » The Zodiac Killer kills Betty Lou Jenson and David Faraday in Vallejo, California.
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I3203.php : accessed January 5, 2026), "Fronica Clasina Hettinga (1886-1968)".
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