View of a salt mine, California, ca.1910 

Salt stacks drying, California, ca.1910 

Locomotive engine used by a salt works, California, ca.1910 

Two men standing among rows of salt stacks in the north end of Death Valley, 1910-1920 

Salt stacks drying, California, ca.1910 

Unidentified salt stacks drying with workers and machinery in the background, ca.1910 

Salt stacks drying in shallow water, California, ca.1910 

Blurred view of two men at a salt mine sitting on a cable that appears to be in motion, ca.1910 

An aerial view of a salt marsh north of Death Valley, California, ca.1910 

Man standing next to the brick building of the salt works north of Redondo Beach, ca.1901(?) 

The Salt Works on the Salton Sea, Colorado Desert, east of Palm Springs, ca.1903 

Concentrator mill at a mine on the Colorado River, California, ca.1900 

Borax Smith's 20-mule team hauling borax across the desert, Death Valley [?], ca.1890 

Borax Smith's mine at Borate or Harmony, California, ca.1890-1900 

"Borax" Smith's mine at Harmony, Death Vallley, ca.1890 

Rail car at top of the ore dump at mine run by Free Gold Mining Company, Hedges, California, ca.1905 

Borax Mill at Daggett, California, ca.1890 

View of the Salton Sea showing salt incrustations (salt crust), Salton Sea Basin, Colorado Desert, east of Palm Springs, ca.1903-1904 

View of the Placer mine at Big Bar, Trinity County, showing a man with mining apparatus, 1900-1910 

Twenty-mule team hauling borax in wagons from mines in Death Valley, ca.1890