Close-up view of IBM Corporation customer engineer Neil Grover servicing the electrical relays on an alphabetic tabulator in the Tabulating Department at the Dow Chemical Company facilities located in Midland, Michigan.…

General view of an unidentified employee at work in the Styron manufacturing facilities at the Dow Chemical Company plant located in Midland, Michigan. Styron is the trade name for Styrenic plastics historically…

General view of employees examining a Styron belt (also known as a ribbon) as it is extruded from a machine in the Styron manufacturing facilities at the Dow Chemical Company plant located in Midland, Michigan. Per…

General view of unidentified employees at work in the Styron manufacturing facilities at the Dow Chemical Company plant located in Midland, Michigan. A Styron belt (also known as a ribbon) is visible being extruded from…

General view of packaged rolls of saran film at a Dow Chemical Company manufacturing facility in Midland, Michigan. Initially developed for the U.S. Army to wrap arms and equipment for transport during World War II,…

Close-up view of an unidentified employee at work in the saran film manufacturing facilities at the Dow Chemical Company plant located in Midland, Michigan. Initially developed for the U.S. Army to wrap arms and…

General view of a conveyor belt transporting cases of Saran Wrap at a Dow Chemical Company manufacturing facility in Midland, Michigan. Initially developed for the U.S. Army to wrap arms and equipment for transport…

General view of sheets of saran film moving through a rolling machine at a Dow Chemical Company manufacturing facility in Midland, Michigan. Initially developed for the U.S. Army to wrap arms and equipment for transport…

Elevated view of a conveyor belt transporting boxes of Saran Wrap at a Dow Chemical Company manufacturing facility in Midland, Michigan. Initially developed for the U.S. Army to wrap arms and equipment for transport…

General view of a conveyor belt transporting rolls of Saran Wrap at a Dow Chemical Company manufacturing facility in Midland, Michigan. Initially developed for the U.S. Army to wrap arms and equipment for transport…

Elevated view of a conveyor belt transporting boxes of Saran Wrap at a Dow Chemical Company manufacturing facility in Midland, Michigan. Initially developed for the U.S. Army to wrap arms and equipment for transport…

Two views of an unidentified employee observing the extrusion of a saran bubble from a rolling machine at the Dow Chemical Company plant in Midland, Michigan. During production, saran film passed through a series of…

Four views showing various stages of the extrusion of saran bubbles from a rolling machine at the Dow Chemical Company plant in Midland, Michigan. The employee visible in the photographs is unidentified. During…

General view of the extrusion of saran bubbles from rolling machines at the Dow Chemical Company plant in Midland, Michigan. During production, molten saran polymer was extruded from circular dies, then cooled and…

General view of employee Louis Vallaincourt observing the extrusion of a saran bubble from a rolling machine at the Dow Chemical Company plant in Midland, Michigan. During production, saran film passed through a series…

General view of the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of assorted glassware and scientific…

General view of a section of the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of assorted glassware and…

General view of a section of the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of assorted glassware and…

General view of a section of the main room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of assorted glassware and…

General view of the drug storage room at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois. Founded in 1887, the Dearborn Chemical…

General view of a portion of the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in Chicago, Illinois, with view of furnaces, assorted balances, and…

Close-up view of the bucking board and crusher used to prepare coal and ore samples for analysis at the Dearborn Drug and Chemical Works (later Dearborn Chemical Company) 35th Street laboratory facilities located in…

Close-up view of machinery used in the production of water treatment chemicals at the Dearborn Chemical Company's 35th Street laboratory facility and manufacturing plant. Founded in 1887, the Dearborn Chemical Company…

Close-up view of machinery used in the production of water treatment chemicals at the Dearborn Chemical Company's 35th Street laboratory facility and manufacturing plant. Founded in 1887, the Dearborn Chemical Company…

Close-up view of employee Charles Andrew at work in the Dearborn Chemical Company's 35th Street laboratory facility and manufacturing plant. Founded in 1887, the Dearborn Chemical Company was a corporate ancestor of…