April 25 » New York becomes the first U.S. state to require automobile license plates.
August 14 » The first claimed powered flight, by Gustave Whitehead in his Number 21.
August 21 » Six hundred American school teachers, Thomasites, arrived in Manila on the USAT Thomas.
August 28 » Silliman University is founded in the Philippines. It is the first American private school in the country.
November 1 » Sigma Phi Epsilon, the largest national male collegiate fraternity, is established at Richmond College, in Richmond, Virginia.
Day of death March 23, 1960
The temperature on March 23, 1960 was between -0.8 °C and 15.4 °C and averaged 7.4 °C. There was 0.1 mm of rain. There was 9.8 hours of sunshine (80%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
March 22 » Arthur Leonard Schawlow and Charles Hard Townes receive the first patent for a laser.
May 1 » Cold War: U-2 incident: Francis Gary Powers, in a Lockheed U-2 spyplane, is shot down over the Sverdlovsk Oblast, Soviet Union, sparking a diplomatic crisis.
May 3 » The Off-Broadway musical comedy The Fantasticks opens in New York City's Greenwich Village, eventually becoming the longest-running musical of all time.
August 19 » Sputnik program: Korabl-Sputnik 2: The Soviet Union launches the satellite with the dogs Belka and Strelka, 40 mice, two rats and a variety of plants.
November 25 » The Mirabal sisters of the Dominican Republic are assassinated.
December 15 » Richard Pavlick is arrested for plotting to assassinate U.S. President-Elect John F. Kennedy.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I20362.php : accessed February 13, 2026), "Willem Slouwerhof (1901-1960)".
Copy warning
Genealogical publications are copyright protected. Although data is often retrieved from public archives, the searching, interpreting, collecting, selecting and sorting of the data results in a unique product. Copyright protected work may not simply be copied or republished.
Please stick to the following rules
Request permission to copy data or at least inform the author, chances are that the author gives permission, often the contact also leads to more exchange of data.
Do not use this data until you have checked it, preferably at the source (the archives).
State from whom you have copied the data and ideally also his/her original source.