Overhead view of the Moore filters used to filter magnesium hydrate slurry at the Dow Chemical Company plant located in Freeport, Texas.

General exterior view, taken at night, of the Dow Chemical Company Texas Division plant located in Freeport, Texas. A range of products and processes were researched, developed, and produced at the plant, including…

General view of Moore filters used to process magnesium hydrate at the Dow Chemical Company's plant located in Freeport, Texas.

General view of the caustic soda evaporators at the Dow Chemical Company plant located in Freeport, Texas. Also known as sodium hydroxide, caustic soda was commonly used to produce ethyl cellulose per the process…

General view of a section of the Dow Chemical Company Texas Division plant located in Freeport, Texas. The tanks visible in the photograph are believed to have been used to store evaporated magnesium chloride, which was…

General view of the sea water intake apparatus at the Dow Chemical Company plant located in Freeport, Texas. Dow commonly processed sea water to obtain magnesium, the world's lightest structural metal.

General view of the Dorr sewage treatment tanks at the Dow Chemical Company plant located in Freeport, Texas.

General view of the light hydrocarbons section of the Dow Chemical Company plant located in Freeport, Texas. Hydrocarbons are compounds of hydrogen and carbon that often occur in petroleum and natural gas and commonly…

General view of the Dow Chemical Company Hydrocarbons plant located in Freeport, Texas. Hydrocarbons are compounds of hydrogen and carbon that often occur in petroleum and natural gas and commonly serve as the building…

General view of the Dow Chemical Company Hydrocarbons plant located in Freeport, Texas. Hydrocarbons are compounds of hydrogen and carbon that often occur in petroleum and natural gas and commonly serve as the building…

General view of the Horton Multisphere storage tank at the Dow Chemical Company plant located in Freeport, Texas.

General view of the lime kiln used to calcinate limestone in order to produce quicklime (calcium oxide) at the Dow Chemical Company plant located in Freeport, Texas. A supply of oyster shells, commonly used to produce…

General view of the exterior of the Dow Chemical Company's Styrene plant located in Freeport, Texas. An organic compound derived from benzene, styrene is a precursor to polystyrene and was popularized in the 1940's as a…

General view of the exterior of the Dow Chemical Company's Styrene plant located in Freeport, Texas. An organic compound derived from benzene, styrene is a precursor to polystyrene and was popularized in the 1940's as a…

General view of the styrene finishing stills at a Dow Chemical Company plant in Midland, Michigan. An organic compound derived from benzene, styrene is a precursor to polystyrene and was popularized in the 1940's as a…

General view of an unidentified employee climbing stairs at the Dow Chemical Company's Styrene plant located in Freeport, Texas. An organic compound derived from benzene, styrene is a precursor to polystyrene and was…

General view of the exterior of a section of the Dow Chemical Company's Styrene plant located in Freeport, Texas. An organic compound derived from benzene, styrene is a precursor to polystyrene and was popularized in…

General view of the exterior of a section of the Dow Chemical Company's Styrene plant located in Freeport, Texas. An organic compound derived from benzene, styrene is a precursor to polystyrene and was popularized in…

General view of the exterior of a section of the Dow Chemical Company Texas Division plant located in Freeport, Texas. A range of products and processes were researched, developed, and produced at the plant, including…

General view of an unidentified employee at work in the Dow Chemical Company Texas Division plant located in Freeport, Texas. A range of products and processes were researched, developed, and produced at the plant,…

General view of the exterior of a section of the Dow Chemical Company Texas Division plant located in Freeport, Texas. A range of products and processes were researched, developed, and produced at the plant, including…

General view of an unidentified employee examining a bobbin from a drawtwister used for the production of Zefran, an acrylic fiber, at the Dow Chemical Company's Textile Research Laboratory located in Pittsburg,…

General view, taken at night, of the Dow Chemical Company's Xanthate plant located in Pittsburg, California. Xanthate salts are commonly used in the production of cellophane and related polymers, as well as in mining to…

General view of plant pathologists at work in a greenhouse located at the Dow Chemical Company's Agricultural Research Laboratory in Seal Beach, California. Per notations accompanying the photograph, the pathologists…

General view of an unidentified employee using an apparatus to conduct an analysis at the Dow Chemical Company's Agricultural Research Laboratory facilities in Seal Beach, California. The laboratory was commonly used to…