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Day in Engineering History Archive - May 25

May 25

Day in Engineering History May 25 Archive - RF CafeMemorial Day - Remember Our Fallen Servicemen!  Please click here to visit RF Cafe.1844: The gasoline engine was patented by Stuart Perry. 1865: Pieter Zeeman who won Nobel Prize in Physics for splitting of spectral lines (the Zeeman effect), was born. 1888: Nobel Prize winner Ascanio Sobrero, who discovered nitroglycerine, died. 1889: Helicopter pioneer Igor Sikorsky was born. 1927: Henry Ford stopped producing Model T car and began producing the Model A. 1940: Penicillin ("mould juice" per its discoverer), was tested and proven effective by Norman Heatley. 1961: President Kennedy announced his goal to initiate a goal of "landing a man on the moon" before the end of the decade. 1973: The U.S. launched the first Skylab crew. 1992: Jay Leno made his debut as permanent host of NBC's "Tonight Show," succeeding Johnny Carson. 1999: Waldo Semon, the inventor of PVC plastic, died. 2008: NASA's Phoenix spacecraft landed on Mars, in search of life.

| Jan | Feb | Mar | Apr | May | Jun | 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. 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.

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Copyright: 1996 - 2024

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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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