Public domain
Oil is filtered with diatomaceous earth to produce a palatable, clear product. One of the largest plants in the United States is in Lindsay, California. This plant can turn out about 800 gallons of oil in twelve hours
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Credit lineOil is filtered with diatomaceous earth to produce a palatable, clear product. One of the largest plants in the United States is in Lindsay, California. This plant can turn out about 800 gallons of oi. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.