J. J. Thomson: The discovery of the electron and the chemists

Summary This article examines the origins and development of J. J. Thomson's chemical thought, and the reception of his theories by chemists. Thomson's interest in chemical combination and atomic theories of matter dates from his formative schooldays at Owens College, Manchester. These themes constituted a persistent leitmotif in the development of Thomson's style of thought, and provided a powerful stimulus which enabled him to enunciate the concept of electrons as fundamental particles. Thomson's influence on chemists during the years 1903 to 1923 reflects the richness and fertility of his chemical thought. He influenced the absorption of the Victorian physical tradition by American chemists, thus adding a mechanistic, picture-embedded style to theoretical chemistry. Thomson's style of thought resonated with the needs of American chemists, but was ignored in Germany.