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. Gear hob from the Barber Coleman Company Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Location: Rockford, Illinois Date: undated Format: Image Agent: unknown
3. First milling machine, Eli Whitney, 1818 Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: 1818 Format: Image Agent: unknown
4. Gear hobbing machine cutting gears Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
5. No 3. Duplex milling machine by Garvin Machine Company Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
6. First universal milling machine Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: 1862 Format: Image Agent: unknown
