This early work is E. W. Brown's 1932 work, "Elements of the Theory of Resonance". It attempts to provide, in an elementary way, a description and analysis of the phenomena particular to resonance, using a pendulum as illustration. This volume will appeal to those with an interest in resonance, and would make for a great addition to collections of classic scientific literature. Contents include: "The Equation", "Method of Approximation", "The Generalized Equation", "Solutions to Equation", "Application to the Pendulum with an Oscillating Support", "Applications to the Mutual Influence of Two Pendulums", "Solutions of Equation", "The Effect of Friction", etc. Many classic books such as this are becoming increasingly rare and expensive. We are republishing this volume now in an affordable, modern, high-quality edition complete with a specially commissioned new biography of the author.