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 June 21
 1781:
Siméon-Denis
Poisson, mathematician and experimenter in electromagnetic theory, was born.
1788: The U.S.
Constitution went into effect when New Hampshire became the 9th state of ratification.
1874: Anders Ångström, after whom the unit of wavelength
is named, died. 1893: The first Ferris wheel premiered at Chicago's Columbian Exposition.
1913: Georgia
Broadwick became the first woman to parachute from an airplane. 1942: Japanese
submarine I-25 launched an attack on Fort Stevens, located on the Columbia
River in OR. 1945: U.S. troops took the island of
Okinawa.
1948: The first successful long-playing microgroove phonograph records were introduced
to the public. 1948: The Small-Scale Experimental Machine (SSEM), the first stored-program
computer, ran its first program. 1986:
Lloyd Espenschied,
co-inventor of coaxial cable, died. 2004: Mike Melvill became the first civilian
to pilot a craft into space, in Rutan's
SpaceShipOne.
2005: The world's first solar sail spacecraft, funded by the non-profit
U.S. Planetary Society,
was placed in orbit.
| Jan
| Feb | Mar |
Apr | May |
Jun | Jul |
Aug | Sep |
Oct | Nov |
Dec |
Note: These
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.
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