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Day in Engineering History Archive - July 16

July 16

The Day of Trinity. Click here to return to the RF Cafe homepage.

Today is the Day of Trinity. 1739: Charles de Cisternay DuFay, discoverer of positive and negative electricity and repulsion between like charges, died. 1867: Reinforced concrete was patented by Joseph Monier of France. 1926: The first underwater color photographs appeared in National Geographic magazine. 1945: The U.S. detonated the first atomic bomb in a test at the Trinity test site in Alamogordo, NM. 1948: The world's first production turboprop aircraft, the Vickers Viscount, made its maiden flight. 1951: Dan Bricklin, co-writer of, VisiCalc, the first spreadsheet computer program, was born. 1957: Marine Maj. John Glenn set a transcontinental speed record when he flew a jet from CA to NY in 3 hours, 23 minutes and 8 seconds. 1969: Apollo 11 blasted off from Cape Kennedy, FL, and began the first manned mission to land on the moon. 1979: Saddam Hussein became president of Iraq. 1994: The first of 21 fragments of the comet Shoemaker-Levy hit Jupiter, creating a 1200-mile wide fireball 600 miles high. 1997: The Dow Jones Industrial Average (DJIA) closed above 8,000 for the first time. 1999: John F. Kennedy, Jr., his wife and her sister, died when their plane that Kennedy was piloting crashed into the Atlantic Ocean. 2002: John Cocke, who invented the Reduced Instruction Set Computer (RISC), died.

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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.
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