Interior of an unidentified factory, showing two factory workers gripping a large piece of equipment, ca.1935 

Factory workers operating on machinery, showing pallet of buckets in foreground, ca.1930 

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

Interior view of a factory, showing large hydraulic press at center, May 1937 

Unidentified factory interior, showing workers adjusting a small slab beneath a large machine, ca.1930 

Interior view of an unidentified factory,showing workers from behind, ca.1940 

Interior view of an unidentified factory, showing three men at a large engine, ca.1940 

Exterior view of large unidentified factory, showing steam pipes in foreground, ca.1950 

Unidentified factory interior, ca.1950 

Interior view of an unidentified factory, with a close-up of male worker, ca.1940 

Unidentified factory interior, ca.1940 

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

Exterior of an unidentified factory, showing the outlines of a porch in the foreground, ca.1925 

Men standing near tables in the interior of an unidentified factory, ca.1920 

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

Several men inside the interior of an unidentified factory, ca.1930 

Man in an unidentified factory interior, ca.1940 

Interior view of the Ray Day Piston Factory in Seattle, Washington, 1930-1940 

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

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