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 March 20
 1800:
Alessandro Volta announced his invention of the electric battery.
1856: American inventor and engineer
Frederick
Taylor, known as the father of scientific management, was born. 1886: America's
first demonstration of the
AC power system provided lighting along Main Street at Great Barrington,
MA. 1900:
Nikola Tesla received a patent for the wireless transmission of
electric power. 1916: Albert Einstein's
Theory of General
Relativity was published in Annalen der Physik. 1925: David Ronald de Mey Warren,
the Australian scientist who invented the flight data recorder (or "black box"),
was born. 1934: The first test of a practical radar apparatus was made by Rudolf
Kuhnold in Kiel Harbour, Germany. 1993: Nobel physicist
Polykarp Kusch, who determined that the magnetic moment of the
electron is greater than its theoretical value, died. 1954: Newspaper vending machines
became big news as the first one was introduced in Columbia, Pennsylvania. 1995:
In Tokyo, 12 people were killed, more than 5,500 others sickened when terrorists
released packages containing the poisonous gas
Sarin into five separate subway trains. 2003: The Iraq war began.
Note: These
historical tidbits (see daily
list) have been collected from various sources, mostly on the Internet.
As detailed in
this article, there
is a lot of wrong information that is repeated hundreds of times because most websites
do not validate with authoritative sources. On RF Cafe, events with
hyperlinks have been verified. Many years ago,
I began commemorating the birthdays of notable people and events with
special RF Cafe logos.
Where available, I like to use images from postage stamps from the country where
the person or event occurred. Images used in the logos are often from open source
websites like Wikipedia, and are specifically credited with a hyperlink back to
the source where possible.
Fair Use laws permit
small samples of copyrighted content.
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