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 

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

View of a salt mine, 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 

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

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

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

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

Traction steam engine hauling borax, ca.1900 

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

Redondo Salt Works, California, ca.1898-1906 

Exterior view of the office of the salt works owned by the Mellus brothers north of Redondo Beach, ca.1900 

View of a copper mine at Bingham near Salt Lake City, Utah, [s.d.] 

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

Twenty-mule team hauling borax out of Death Valley to the railroad, ca.1900