April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 12 » Tirah Campaign: In the Battle of Saragarhi, ten thousand Pashtun tribesmen suffer several hundred casualties while attacking 21 Sikh soldiers in British service.
December 30 » The British Colony of Natal annexes Zululand.
Day of death July 4, 1970
The temperature on July 4, 1970 was between 10.8 °C and 18.7 °C and averaged 14.2 °C. There was 2.5 mm of rain during 2.0 hours. There was 2.0 hours of sunshine (12%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
June 4 » Tonga gains independence from the United Kingdom.
July 8 » Richard Nixon delivers a special congressional message enunciating Native American self-determination as official US Indian policy, leading to the Indian Self-Determination and Education Assistance Act of 1975.
October 5 » The Public Broadcasting Service (PBS) is founded.
November 1 » Club Cinq-Sept fire in Saint-Laurent-du-Pont, France kills 146 young people.
November 13 » Bhola cyclone: A 150-mph tropical cyclone hits the densely populated Ganges Delta region of East Pakistan (now Bangladesh), killing an estimated 500,000 people in one night.
November 14 » Soviet Union enters ICAO, making Russian the fourth official language of organization.
When copying data from this family tree, please include a reference to the origin: Nico Willemse, "Gijsendopher family tree compiled by N.W.Willemse", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gijsendopher/I71.php : accessed February 13, 2026), "Leonard Maurits Glazener (1897-1970)".
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