Inventor Alan Clark was granted his patent for the telescope.
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German polymath Gottfried Wilhelm Leibniz demonstrated integral calculus for the first time.
After nearly four and a half years of cataclysmic conflict, World War I ended.
The first college fraternity, The Flat Hat Society, was formed in the Raleigh Tavern at the College of William and Mary in Williamsburg, Virginia.
Canada's second-largest city, Montreal, started dumping untreated waste in the Saint Lawrence River.
Washington became the 42nd state to join the United States of America.
