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  April 15
Tax Day in the U.S.A. 1452:
Leonardo
Da Vinci was born. 1856: Conrad Hubert, founder of the
Ever-Ready
Battery Co., was born. 1707:
Leonhard Euler,
very familiar to all engineering students and renown for his photographic memory,
was born. 1912: The British luxury liner
RMS Titanic sank
in the North Atlantic off Newfoundland less than three hours after striking an iceberg,
killing 1,500 people. 1892: The
General Electric
Company was formed by the merger of the Edison Electric Light Co. and other
firms. 1912: The time was spoken of by Einstein as the 4th dimension. 1923: Dr.
Lee de Forest demonstrated
phonofilm
- his technique for putting sound on motion picture film. 1941: Igor Sikorsky made
the first helicopter flight over one-hour duration in his VS-300. 1945: British
and Canadian troops liberated the Nazi concentration camp Bergen-Belsen. 1952: The
first
B-52 Bomber prototype was tested in the air. 1964: The
Chesapeake Bay Bridge-Tunnel (CBBT) opened, at the time the longest
in the world at 17.6 miles shore-to-shore.
| 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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