James Clerk Maxwell's (1831 1879) contributions to twentieth-century science and technology - in particular, the displacement current and the electromagnetic theory of light - are among the most spectacular innovations in the history of physics, but the technical complexities and thematic subtleties of his work have been difficult to unravel. In considering the historical development of Maxwell's work, Dr Siegel's close analysis of the original texts - with careful attention to the equations as well as to the words - reveals that mechanical modeling played a crucial role in Maxwell's initial...