JOHN TYNDAL

JOHN TYNDAL (1820-1893), physicist, born in co. Carlow, Ireland; succeeded Faraday at the Royal Institution; wrote on electricity, sound, light, and heat, as well as on the "Structure and Motion of the Glaciers," in opposition to Forbes, whose theory was defended in strong terms by Ruskin; wrote also "Lectures on Science for Unscientific People," much praised by Huxley.