General view of laboratory technicians analyzing assorted materials in a Dow Chemical Company laboratory. Per notations accompanying the photograph, Bill Herrick (left) is analyzing calcium chloride, which was used for…

General view of technician Leo Ruhnau using an apparatus to determine the percentage of hydrochloric acid in Dowell acids at a Dow Chemical Company laboratory.

General view of technician James Geary using a Klett-Summerson Photoelectric Colorimeter to obtain a determination of iodine at a Dow Chemical Company laboratory. Designed in the 1930's by two Cornell University Medical…

General view of technicians Marguerite Tenhunen (left) and Dorothy Ferris (right) using assorted apparatus in a Dow Chemical Company laboratory to determine the quantity of zinc present in experimental alloys.

General view of technicians (left to right) Lois Nystrom, Rosemary Kirchman, and Helen Lyness using vacuum tube titrators to titrate aluminum in a Dow Chemical Company laboratory. In the titration process, a solution of…

General view of Willard King working with an apparatus used for pilot plant operations at the Dow Chemical Company's Plastics Production Laboratory. Established in 1953 as an outgrowth of Dow's Physical Research…

General view of Wilbur Myers testing large-scale cracking and dehydrogenation processes on an apparatus in the Dow Chemical Company's Plastics Production Laboratory. Established in 1953 as an outgrowth of Dow's Physical…

General view of Ray Kent checking a polymer operation at the Dow Chemical Company's Plastics Production Laboratory. Established in 1953 as an outgrowth of Dow's Physical Research Laboratory, the Plastics Production…

General view of Richard Bayne testing distillation and miniplant operations at the Dow Chemical Company's Plastics Production Laboratory. Established in 1953 as an outgrowth of Dow's Physical Research Laboratory, the…

General view of Willard Van Wingerden performing maintenance on a specialty instrument in the Dow Chemical Company's Plastics Production Laboratory. Established in 1953 as an outgrowth of Dow's Physical Research…

General view of instrument journeyman Willard Van Wingerden operating a 16mm film projector at a Dow Chemical Company employee group meeting. Wingerden was a member of Dow's Instrument Department, which was responsible…

General view of Melvin Dietzel (kneeling) and Larry Oeffner examining the stock supply of replacement parts in the Dow Chemical Company's Instrument Department. Established in 1926, the Instrument Department was…

General view of instrument journeyman Harry Beamish inserting an element into a Foxboro recording thermometer in the Dow Chemical Company's Instrument Department. Established in 1926, the Instrument Department was…

General view of Instrument calibrationist August Aaron checking the calibration of a voltmeter in the Dow Chemical Company's Instrument Department. Established in 1926, the Instrument Department was responsible for the…

General view of instrument journeyman Norris Hunemorden servicing a Foxboro recorder, part of the control panel at the Dow Chemical Company's Ethylene Glycol Plant. Hunemorden was a member of Dow's Instrument…

General view of the Instrument Department workroom at the Dow Chemical Company plant located in Midland, Michigan. Established in 1926, the Instrument Department was responsible for the installation and maintenance of…

General view of the Instrument Department workroom at the Dow Chemical Company plant located in Midland, Michigan. Established in 1926, the Instrument Department was responsible for the installation and maintenance of…

General view of skilled instrument specialist Robert L. Kennedy cleaning and repairing a stop watch in the Dow Chemical Company's Instrument Department. Established in 1926, the Instrument Department was responsible for…

Aerial view of a section of the Dow Chemical Company's polystyrene plant located in Cartagena, Colombia. Constructed in the 1960s, the Cartagena plant subsequently underwent four expansions and boasted a manufacturing…

Aerial view of the Dow Chemical Company's polystyrene plant located in Cartagena, Colombia. Constructed in the 1960s, the Cartagena plant subsequently underwent four expansions and boasted a manufacturing capacity of…

Aerial view of the Dow Chemical Company's polystyrene plant located in Cartagena, Colombia. Constructed in the 1960s, the Cartagena plant subsequently underwent four expansions and boasted a manufacturing capacity of…

General view of two unidentified employees at work in the Dow Chemical Company's magnesium alloy plant located in Madison, Illinois. Dedicated in 1954, the magnesium fabrication plant in Madison was the world's first…

General view of the Dow Chemical Company's first Berry Safety Boiler being delivered to the Plant A Power House at the company's facilities in Midland, Michigan. Two of the individuals visible in the photograph are…

General view of the railroad tracks located along the Tittabawassee River near Plant E, part of the Dow Chemical Company facilities located in Midland, Michigan.

Black and white aerial photographic view, taken from the Tittabawassee River, of the Dow Chemical Company plants and facilities located in Midland, Michigan.