Inventor Benjamin J. Lane patented the first self-contained gas mask.
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The first Earl of Shaftesbury, Anthony Ashley Cooper, was arrested for high treason in England.
Charles J. Guiteau shot US President James A. Garfield in Washington, D.C.
American aviator Amelia Earhart disappeared.
Inventor Thomas Savery patented the first steam engine in England.
North and South Vietnam were formally reunified after more than twenty years of war.