A PRACTICAL TREATISE ON HYDRAULIC MINING IN CALIFORNIA. WITH DESCRIPTION OF THE USE AND CONSTRUCTION OF DITCHES, FLUMES, WROUGHT-IRON PIPES, AND DAMS; FLOW OF WATER ON HEAVY GRADES, AND ITS APPLICABILITY, UNDER BY AUG. J. BOWIE, JR., FIFTH EDITION. NEW YORK: D. VAN NOSTRAND COMPANY, 23 MURRAY AND 27 WARREN STREET. |