The temperature on September 11, 1868 was about 14.9 °C. The air pressure was 3 kgf/m2 and came mainly from the northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 86%. Source: KNMI
From June 1, 1866 till June 4, 1868 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Heemskerk with the prime ministers Mr. J.P.J.A. graaf Van Zuijlen van Nijevelt (AR) and Mr. J. Heemskerk Azn. (conservatief).
From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
January 3 » Meiji Restoration in Japan: The Tokugawa shogunate is abolished; agents of Satsuma and Chōshū seize power.
March 8 » Sakai incident: Japanese samurai kill 11 French sailors in the port of Sakai, Osaka.
April 10 » At Arogee in Abyssinia, British and Indian forces defeat an army of Emperor Tewodros II. While 700 Ethiopians are killed and many more injured, only two British/Indian troops die.
May 26 » The Impeachment of Andrew Johnson ends with his acquittal by one vote.
October 7 » Cornell University holds opening day ceremonies; initial student enrollment is 412, the highest at any American university to that date.
December 10 » The first traffic lights are installed, outside the Palace of Westminster in London. Resembling railway signals, they use semaphore arms and are illuminated at night by red and green gas lamps.
Day of marriage June 21, 1891
The temperature on June 21, 1891 was about 19.1 °C. The air pressure was 7 kgf/m2 and came mainly from the north-northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 72%. Source: KNMI
In The Netherlands , there was from April 21, 1888 to August 21, 1891 the cabinet Mackay, with Mr. A. baron Mackay (AR) as prime minister.
In The Netherlands , there was from August 21, 1891 to May 9, 1894 the cabinet Van Tienhoven, with Mr. G. van Tienhoven (unie-liberaal) as prime minister.
February 15 » Allmänna Idrottsklubben (AIK) (Swedish Sports Club) is founded.
March 10 » Almon Strowger patents the Strowger switch, a device which led to the automation of telephone circuit switching.
May 5 » The Music Hall in New York City (later known as Carnegie Hall) has its grand opening and first public performance, with Tchaikovsky as the guest conductor.
May 20 » History of cinema: The first public display of Thomas Edison's prototype kinetoscope.
October 1 » Stanford University opens its doors in California, United States.
December 22 » Asteroid 323 Brucia becomes the first asteroid discovered using photography.
When copying data from this family tree, please include a reference to the origin: Hans Dunning, "Family tree Dunning", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-dunning/R3722.php : accessed January 28, 2026), "Wilhelmina Mertens (1868-????)".
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