Traction steam engine hauling borax, ca.1900-1904 

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

Twenty-mule team hauling borax in a wagon as seen from behind, probably in Mule Canyon, ca.1890 

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

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

Sixteen-mule team hauling borax from old Borate, ca.1890-1900 

A traction engine hauling sugar beets, Visalia, Tulare County, California, ca.1900 

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

Borax Mill at Daggett, California, ca.1890 

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

Two 20-mule teams each hauling 4 ore wagons, Pinal County, Arizona, ca.1900 

A man driving a 14-mule team hauling wagons loaded with ore from the desert mines, California, ca.1905 

Two men posing on a trolley-line engine for hauling ore cars, Grass Valley, northern California, ca.1900 

A steam engine hauling rock for the construction of the San Pedro breakwater, ca.1899 

Twelve-mule team pulling four wagons of grain, Hanford(?), ca.1900 

Pacific Coast Borax Company at Death Valley Junction, California, ca.1900/1950 

Volcano Kilauea, Hawaii, showing flow(?) and steam, 1907 

Drennen's Mill -- stamp mill and concentrator -- on the Colorado River, 1900-1950 

Logging train with engine capable of hauling log train up steep grades, ca.1900 

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