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Washington Chemical Company, supplier of magnesia and other chemical products, of Washington Station, Co Durham
Supplier of magnesia to Newalls Insulation Co Ltd. A member of the International Magnesia Association
1872 Dissolution of the Partnership between Robert Benson Bowman, Isaac Lowthian Bell, and Robert Stirling Newall, as Chemical Manufacturers, at Washington, in the county of Durham, under the style or firm of the Washington Chemical Company, by the retirement of Isaac Lowtbian Bell.
1953 left the International Magnesia Association