1. Machine which drills holes into aircraft engine crankcases. Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: Pratt & Whitney Aircraft
2. Muliple drilling machine drawing comparing old and new methods. Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
3. W. C. Lipe Company horizontal duplex drill machine Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
