Originally published in 1958, this book was primarily written to provide information on torsional vibration for the design and development departments of engineering companies, although it was also intended to serve students of the subject. For the engine designer, the recommended formulae, graphical procedures, numerical examples and tabulated values are given, followed by remarks regarding the limitations of each method and its mathematical derivation. For the development engineer, descriptions of test procedures, rigs and instrumentation are given in detail, together with remarks regarding precautions against possible sources of error, and the order of accuracy to be expected in test results. This book will be of value to anyone with an interest in torsional vibration and the development of engineering practice.