Abstract Consists of seventeen photographs documenting the destructive effects of hydraulic mining. Includes images of washed-over roads, ruined orchards, broken dams, riverbank gravel deposits, and working hydraulic hoses. Photos were taken in Nevada, Sutter, and Yuba counties and feature the Yuba and Feather Rivers. Two other photographs depict waterfront and shipping scenes in unidentified location, probably San Francisco. One photograph shows a dredge docked near an unidentified waterfront. J.A....