This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant mark

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced

Excerpt from Hydraulic and Placer Mining The author here acknowledges the kindness of the Risdon Iron Company and the. Mining and Scientific Press, of Californi