Tyndall, JOHN (1820-94), the physicist, was born at Leighlin Bridge, in Ireland. After having been an engineer at Manchester, he began his original work while a teacher at Queenwood College in Hampshire. He studied at Marburg and Berlin, and in 1853 was made professor to the Royal Institution. In 1874 his address as President of the British Association roused the indignation of theologians. He afterwards became scientific adviser to the Board of Trade. His death resulted from accidental poisoning during an illness in 1894. His chief works were Heat as a Mode of Motion (1863), Hours of Exercise in the Alps (1871), The Forms of Water in Clouds and Rivers, Ice and Glaciers (1872), and Fragments of Science (1876 and 1892); and he was very successful as a lecturer both in England and America.