Exterior at Llewellyn Iron Company, showing workers at construction site, ca.1930 

Close-up of a man chiseling something inside an unidentified factory, ca.1940 

Man working at the Morris Stamping and Manufacturing Company, in February 1938 

Several men at the National Supply Company factory interior, ca.1930 

Close-up view of factory worker adjusting a lidded piece of machinery, ca.1950 

Two men working at a machine inside an unidentified factory, ca.1942 

Two male workers inside a factory, ca.1930 

Unidentified factory interior, ca.1950 

Female workers in a textile mill, showing a single woman with her back to the camera in the foreground, ca.1930 

Exterior of the International Paper Company dissolving pulp mill, 1958 

Close-up of a man working a machine inside an unidentified factory, ca.1935 

Line of workers inside the Firestone Rubber Company, ca.1928 

Lines of women workers at the Acme Electronics company, showing a man standing in the foreground, ca.1940 

Interior of a factory with metal workers, ca.1930 

Workers showing a method of pipe bending at the Crane Company, ca.1920 

Interior view of unidentified factory, showing a single worker standing near the turbines, ca.1935 

Unidentified cold mill, ca.1930 

Man working at an elaborate electronic desk inside an electronics plant, ca.1940 

Interior of an unidentified factory where a worker is "machining heat exchanger bodies", ca.1930 

Interior of the California Clay Products Company, ca.1930