(1856) African American general surgeon Daniel Hale Williams was born. He was the second person to perform a documented successful pericardium surgery to repair a wound.
(1896) For the first time, an X-ray generating machine is exhibited.
(1977) Scientists finally identified the cause of Legionnaires’ disease as a previously unknown bacterium.
 African American general surgeon Daniel Hale Williams was born. He was the second person to perform a documented ...){kind=link}