Sonoma Magnesite Company plant containing 50-foot rotary kiln. California. August 25, 1917.

USGS Historical Photograph

Date: 27/02/15

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Sonoma Magnesite Company, lower quarry, near Cazadero. California. August 25, 1917.

USGS Historical Photograph

Date: 27/02/15

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Sonoma Magnesite Company

Sonoma Magnesite Company train hauling load of calcined magnesite, at Magnesia siding. Sonoma County, California. August 25, 1917. USGS Historical Photo

Date: 25/09/13

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