1997 was the 'Year of the Electron' because it marked the centenary pf the celebrated discovery of the smallest of the fundamental particles that make up ordinary matter, and which has proved to have so many remarkable properties that, after light, it has become the most widley used of the particles in scientific and technogical applications. STEM is a discipline of importance to a growing number of microscopists. This book is essential reading for undergraduates, postgraduates and researchers requiring an up-to-date and comprehensive introduction to this rapidly growing, state of the art technique.