Day in Engineering History Archive - February 22

February 22

1785: Jean-Charles-Athanase Peltier, discoverer of the effect whereby current passing through a junction of dissimilar metals produces heat or cold depending on polarity, was born. 1857: German physicist Heinrich (Rudolf) Hertz, who was the first to broadcast and receive radio waves, was born. 1876: Johns Hopkins University opened for business in Baltimore, MD. 1900: Paul Kollsman, inventor of the first accurate barometric altimeter, was born. 1974: Barbara Allen Rainey became the first female aviator in the U.S. Navy. 1994: The Justice Department charged 31-year CIA veteran Aldrich Ames and his wife, Rosario, with selling national security secrets to the Soviet Union (Ames was later sentenced to life in prison; his wife received a 5-year term).

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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.