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March 13
  1773:
Joseph Priestley, discoverer elemental oxygen, ammonia, hydrochloric
acid gas, carbon monoxide, sulfur dioxide, and oxides of nitrogen, was born. 1781: The
planet Uranus was
discovered by Sir William Herschel. 1842:
Henry Shrapnel,
inventor of the type of mortar that bears his name, died. 1855:
Percival
Lowell, the American astronomer who helped discover Pluto and believed that there
was life on Mars, was born. 1933: Astronomer
Robert Innes,
who discovered
Proxima Centauri, the closest star to our sun, died. 1937:
Elihu Thomson,
electrical engineer and inventor whose discoveries in the field of alternating current
led to the development of successful alternating current motors, died. 1886:
Albert Stevens,
who took the first photograph of
Earth showing its curvature, was born. 1989: A series of
solar flares
caused a violent magnetic storm that brought power outages over large regions of Canada.
1992: The
FCC ruled companies can own 30 AM and 30 FM stations. 1998: German
engineer Hans von
Ohain, who developed the first operational jet engine (HeS3b used in the
Heinkel He 178), died. 2012:
Tom Johnson,
founder of the Celestron telescope company, died.
| 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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