The Dutch-born physician and chemist discovered the phenomena when he placed plants underwater. He did many other experiments involving metals, which led to the discovery of metals conducting heat. He also helped save the life of the Austrian royal family during the smallpox epidemic. He was given the coveted title of being the royal doctor because of his accomplishment! Ingenhousz’s contributions to the scientific community were truly great. So without further ado, here are the Top 25 Facts About Jan Ingenhousz.