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Day in Engineering History Archive February 19

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| 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.
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 ;-) A couple 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.

February 19

Svante Arrhenius' Birthday - Please click here to visit RF Cafe.

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.


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