The temperature on May 7, 1868 was about 18.1 °C. The air pressure was 2 kgf/m2 and came mainly from the east-northeast. The airpressure was 76 cm mercury. The atmospheric humidity was 36%. 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 12 » The National Trust is founded in the United Kingdom.
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 27 » The inaugural run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City, the first U.S. passenger train to use electric locomotives.
October 4 » Horace Rawlins wins the first U.S. Open Men's Golf Championship.
October 8 » Korean Empress Myeongseong is assassinated by Japanese infiltrators.
November 5 » George B. Selden is granted the first U.S. patent for an automobile.
When copying data from this family tree, please include a reference to the origin: P.D. Mollet, "Family tree Mollet, van de Pol, ea", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-mollet-van-de-pol/I334406.php : accessed June 15, 2024), "Hendrik Wouter "Hendrik Wouter" Kalff (1835-1895)".
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