Furniture plant with workers, ca.1930 

Interior view of an unidentified factory, with two suited men inspecting metal parts, while workers are on an assembly line in background, ca.1942 

Electronics (?) plant with workers, ca.1940 

Interior view of an unidentified automobile factory showing workers on an assembly line, ca.1925 

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

Interior of a factory with metal workers, ca.1930 

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

Interior view of an unidentified factory, perhaps a war (?) industry plant, ca.1942 

Exterior view of the Long Beach Steam Plant transformers, ca.1930 

Workers and storage batteries, ca.1930 

Three workers inside a factory, surrounded by large sacks, ca.1930 

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

Interior of a metal factory, ca.1930 

Interior view of a walnut packing plant, showing women workers, 1930 

Interior view of a Los Angeles automobile factory showing workers on an assembly line, ca.1925 

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

Transformer bank on the Long Beach Steam Station, ca.1929 

Plumbing and heating equipment inside an unknown plant, ca.1930 

Factory interior of the Pacific Clay Products Company's Plant #4, ca.1934 

Interior view of an electric plant, ca.1930