1. Dimensions and time costs of work done on the flat-turret lathe Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Location: unknown Date: undated Format: Image Agent: unknown
2. Various thread counts on metal studs and screws with time it takes to create them. Collection: Early 20th Century Engineering Lantern Slides Set: Transfer of skill Date: undated Format: Image Agent: unknown
