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The Refugio Valley
Rocks, Soils, Hills and Valleys
Estuary and Watershed
Human Settlement
Rails, Piers and Roads
The Hercules Powder Works
Explosives and the Second Industrial Revolution
Commerce in Explosive Products
Operation and Development of the Hercules Works
Conditions of Production
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Factory Town
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“Historic US 40 Route” Sign Project
Seeking Information on Ceramic Acid Vessels
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Still Image
Explosives Industry
Giant Powder
Rock House Canyon - “Cradle of US Dynamite Industry”
Contemporary photo with cutline describing location of Giant Powder Works in Rock House Canyon, San Francisco.
Map
Estuary+Watershed
San Pablo Bay
San Pablo Bay
Map
Land Use
Sandow Maps
Legend: Maps Showing Portions of Alameda and Contra Costa Counties, City and County of San Francisco, Carefully Compiled From Official and Private Maps, Surveys and Data
Showing 160 to 162 of 199 results
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