Copernicus, who published proof of a sun-centered solar system, was born. 1834: Dutch
Herman Snellen, developer of the visual acuity
seen in all opticians' offices, was born. 1859:
Svante Arrhenius, whose famous
equation relating temperature change to chemical reactions and is
applied to semiconductor lifetime acceleration, was born. 1878: Thomas Edison received
a patent for his
phonograph. 1916: Ernst Mach, of speed of sound unit defining fame, died. 1945: During
World War II, 30,000 U.S. Marines landed on the island of
Iwo Jima, where
they encountered ferocious resistance from Japanese forces, and took control of the strategically
important island after a month-long battle. 1977: President Ford pardons Iva Toguri D'Aquino
("Tokyo Rose"). 1986: The Soviet Union launched the
Mir space station.
| Feb | Mar |
Apr | May |
Jun | Jul |
Aug | Sep |
Oct | Nov |
historical tidbits 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.