The welcome accorded to the first two editions of this book has been most encouraging. The object of the third edition continues to be to give a brief but "fair

As a slag heap, the result of strip mining, creeps closer to his house in the Ohio hills, fifteen-year-old M. C. is torn between trying to get his family away a

Principles of Geophysics is an essential, comprehensive resource for researchers and students, emphasizing both the physical basis and practical uses of geophys