August Mobius was one of the nineteenth century's most influential mathematicians and astronomers. Written by six distinguished contributors, this book explores the work of Mobius and his fellow-German scholars, in particular the achievements which act as a mirror for the work being undertakenby his contemporaries around the world. The background to Mobius's life and labours is provided by John Fauvel. Gert Schubring examines the mathematical community in nineteenth-century Germany, while Allan Chapman describes the revolution in astronomy that took place during the period. Jeremy Gray analyses Mobius's contribution togeometrical mechanics and Norman Biggs traces his role in the development of topological ideas. Finally, Ian Stewart explores the legacy Mobius left to mathematics in our own century.