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AUGUST 21

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1754 William Murdoch (English Inventor) William Murdoch Inventors & Inventions
1756 John Loudon McAdam (Scottish Inventor of the Tarmac Paving Material and Technique) Scottish Scientists & Mathematicians Inventors & Inventions Technology & Society
1789 Augustin Louis Cauchy (French Mathematician) Augustin Louis Cauchy Calculus
1811 William Kelly (Pennsylvania-born Iron Manufacturer and Inventor) William Kelly Iron Inventors & Inventions
Deaths
Persons of Historic Significance Who Have Died on This Date
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1888 William Burroughs Patents First Practical Adding & Listing Machine New York Scientists and Mathematicians Patents & Trademarks Inventors & Inventions Historic Firsts Technology & Society
1959 U.S. "Little Joe Series" Mercury-Atlas Test Rocket Fires 30 Minutes Prematurely & Attains Altitude of 2,000' Space Exploration NASA
1965 NASA Launches Gemini 5 to Assess Effects of 8 Days of Weightlessness Space Exploration NASA
1972 NASA Launches Orbiting Observatory to Observe the Celestial Sphere Above Earth's Atmosphere Space Exploration Earth Science NASA
1985 6.3 Magnitude Earthquake Destroys 60 Homes and Injures 100 People Along Peru's North Coast Peru Earthquake USGS
1986 Volcanic Carbon Dioxide Eruption Wipes Out Four Cameroon Villages Killing Nearly 2,000 Cameroon Volcanoes Carbon Dioxide Death History Channel BBC