1783: The Treaty of Paris was signed, officially ending the American Revolutionary War
1902: A streetcar in Pittsfield, MA, slammed into President T. Roosevelt’s carriage, tossing him 40 feet and gashing his leg, which led to chronic osteomyelitis that never completely healed.
1919: Wilson set out on a speaking tour to promote the League of Nations against medical advice.
1928: Microbiologist Alexander Fleming returned from vacation and noted that one area of his staphylococci cultures did not grow, contaminated by a fungus. He called the fungal substance penicillin.