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.
All will eventually be either verified or removed.
Please
submit
significant historical events and dates for inclusion in these lists. I will be glad to
include your name and birthday. Please do not submit your death date ;-)
February 19
1473: Polish astronomer Nicolaus Copernicus, who published proof of a sun-centered solar system, was born. 1834: Dutch ophthalmologist Herman Snellen, developer of the visual acuity Snellen Chart 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.
Note: Numbers shown are NOT total page views; they are unique IP addresses for each 24-hour period (i.e., unique visitors). Typical page view counts are at least twice the reported unique visitor number.
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