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Caption: "6 inch Howitzers -- Camp Kearney," c. 1917. View of several 6" Howitzers, as well as several outbuildings and a line of artillery weapons under canvas covers. William McCarthy is standing next to the middle Howitzer. Camp Kearney was established by the U.S. Army in 1917 just north of San Diego. The post was largely abandoned by the government in 1920, used as a military and civilian airfield. It did not see increased military service again until the 1930s.
Date: 1917
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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