Originally published in 1923, as part of the Cambridge Geological Series, this book is composed of two main sections: the first presents an account of the general principles underlying the formation of ore deposits and the changes that they subsequently undergo; the second describes and illustrates a certain number of typical examples of mineral deposits, putting them in a geological context. Textual notes and numerous illustrative figures are also included. This book will be of value to anyone with an interest in geology and the history of science.