January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 9 » The Davis Cup competition is established.
May 17 » The children's novel The Wonderful Wizard of Oz, by L. Frank Baum, is first published in the United States. The first copy is given to the author's sister.
July 19 » The first line of the Paris Métro opens for operation.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 18 » The Upper Ferntree Gully to Gembrook, Victoria Narrow-gauge (2ft 6 in or 762mm) Railway (now the Puffing Billy Railway) in Victoria, Australia is opened for traffic.
Day of marriage September 28, 1927
The temperature on September 28, 1927 was between 4.5 °C and 16.7 °C and averaged 10.1 °C. There was 9.3 hours of sunshine (78%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Jan Westmaas, "Family tree Westmaas en Lagendijk", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-westmaas-lagendijk/I44443.php : accessed May 11, 2024), "Frederik Petrus Valk (1900-)".
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