Inventor Thomas Savery patented the first steam engine in England.
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American aviator Amelia Earhart disappeared.
Inventor Benjamin J. Lane patented the first self-contained gas mask.
North and South Vietnam were formally reunified after more than twenty years of war.
'Harry Potter and the Chamber of Secrets,' the second book in the series, was published by Bloomsbury in the UK.
The International Astronomical Union named Pluto's fourth and fifth moons Kerberos and Styx.
