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Day in Engineering History Archive - December 25 | ||||||
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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.
December 25  1741: The Centigrade temperature scale was devised by astronomer Anders Celsius. 1776: General George Washington and his troops crossed the Delaware River for a surprise attack against Hessian forces at Trenton, NJ. 1868: Linus Yale, inventor and manufacturer of locks, including the cylinder or pin-tumbler lock known by his name, died. 1988: Ernst Ruska, an electrical engineer who invented the electron microscope, was born. 1939: "A Christmas Carol," by Charles Dickens, was read on CBS radio for the first time. 1966: St. Elmo Brady, the first black man to earn a PhD in chemistry, died. 1977: Silent films legend Charlie Chaplin died. | ||||||
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