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Caption: "An Abandoned Hydraulic Mine near Camptonville Calif.," c. 1920. Hillside ravaged by hydraulic mining, in which a pressurized jet of water washes sediment and gravel into a series of sluices, allowing the heavier gold and gold-carrying sediment to sink to the bottom for removal. California banned this environmentally destructive practice in 1884.
Date: 1920
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List of bulletins and circular letters relating to procedures published and distributed to counties
Date: Undated
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Statement on the responsibilities of social agencies to integrate the Japanese population
Date: Undated