This book is an introduction to terrestrial magnetohydrodynamics. It is a compendium of introductory lectures by experts in the field, focussing on applications in industry and the laboratory. A concise overview of the subject with references to further study.

At long last, this volume offers a novel and understandable formulation of entropy, a key concept of thermodynamics. Traditional approaches to the derivation of entropy do not make it easy to comprehend this important dimension in thermodynamics. The Entropy Principle presents a significantly improved derivation and structured formulation of entropy that is well suited for basic university education.