Large stack of salt being piled at a salt mine, California, ca.1910 

Salt stacks drying, California, ca.1910 

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

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

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

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

Salt stacks drying, California, ca.1910 

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

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

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

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

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

Desert view showing mining equipment, ca.1907 

Interior view of a mine (named Bagdad Mine?) belonging to the Rochester Gold Mining Co., Ludlow, California, ca.1900 

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

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

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

Portrait of miners in the 2,200 level of the Empire Mine, Grass Valley, prior to 1906 

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

Interior view of Bagdad mine on the 90 feet level, California, ca.1900