Josiah Edward Spurr, HB, 361pp, McGraw-Hill Book Company Inc, 1926.

2nd edition. The aim of the author in this study on the physical history of the earth is to give the reader a comprehensive study of geological principles, a knowledge of which is
esential to the understanding and proper exploitation of ore deposits. The work is aid to the mining man, beginner and all others interested in the study of economic geology.