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  April 23
1858:
Max Planck, who introduced quantum theory to the world, was born.
1896: The Vitascope
system for projecting movies onto a screen, invented by Francis Jenkins and Thomas
Armat, was demonstrated in New York City. 1915: The A.C.A. became the National Advisory
Council on Aeronautics (NACA), which
later became NASA. 1940: The
Ray-o-Vac leak-proof flashlight battery was patented by Herman
Anthony. 1955: Congress ordered all U.S. coins to bear motto "In God We Trust."
1968: The first
decimal coins
were distributed in Britain in preparation for replacing the current system of pounds,
shillings and pence. 1985: Coca-Cola Co. announced it was changing the secret formula
for Coke. 1994: The subatomic particle called the top quark was discovered at the
DoE's Energy's Fermi National Accelerator Lab.
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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