Day in Engineering History Archive - April 19

April 19

Happy Birthday, Melanie! - Please click here to visit RF Cafe.

1775: The Battles of Lexington and Concord, the first military engagements of the American Revolutionary War including "the shot heard round the world," were fought. 1831: German physicist Johann Gottlieb Friedrich von Bohnenberger, inventor of the gyroscope, died. 1877: Ole Evinrude, of outboard motor fame, was born. 1906: Nobel laureate Pierre Curie, who along with his wife, Marie, discovered spontaneous radioactivity in radium and polonium, died. 1948: The ABC television network went on the air for the first time. 1961: My lovely wife, Melanie, was born - Happy Birthday! 1975: India launched its first satellite, Aryabhata, with aid from the USSR. 1989: Pro-Democracy demonstrations began in Beijing's Tiananmen Square. 1993: Attorney General Janet Reno ordered the raid on the Branch-Davidian compound in Waco, TX, that resulted in the death of 86 men, women and children. 1995: A truck bomb, driven by Timothy McVeigh and an unidentified passenger, exploded outside the Alfred P. Murrah Federal Building in Oklahoma City, killing 168 people, and injuring 500.

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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. 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.