1. Close up of electronic milling tool cutting a bracket for an airplane propeller in Chicago Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Location: Chicago, Illinois Date: undated Format: Image Agent: unknown
2. Man standing near giant lathe for machining large metal objects. Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
3. Man operating a lathe for machining metal. Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
