Public domain
New Idria, California. A rotary kiln at the mercury extraction plant of the New Idria Quicksilver Mining Company. A 1200 degree Fahrenheit heat drives off the sulphur and vaporizes the mercury, later condensed
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineNew Idria, California. A rotary kiln at the mercury extraction plant of the New Idria Quicksilver Mining Company. A 1200 degree Fahrenheit heat drives off the sulphur and vaporizes the mercury, later . 1942-01-01. Feininger, Andreas. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.