A photographic portrait of Profesor John Tyndall (1820-93), published by W. and D. Downey, after Tyndall's death, in 1894. Initially a railway engineer, Tyndall later devoted himself to chemical research, becoming Profesor of Natural Philosophy at the Royal Institution in 1853. In 1867 he succeeded Michael Faraday as Superintendent. Tyndall's research was mainly in the fields of light, sound, and radiant heat. He also made significant studies of Alpine glaciers. In 1872, Tyndall gave the proceeds of a highly succesful American lecture tour towards the advancement of scientific research in America. This photograph appears in 'The Cabinet Portrait Gallery' series of celebrity portraits and biographies published in the 1890s. The series includes royalty, actors, academics and authors.
© NMeM / Kodak Collection / Science & Society