1. Drawing of 5 floors in a plant in relation to Main Street. Collection: Early 20th Century Engineering Lantern Slides Set: Plant Layout Date: undated Format: Image Agent: unknown
2. Present operation on a shaft with 20 steps along with proposed revised operation with fewer (11) steps. Collection: Early 20th Century Engineering Lantern Slides Set: Plant Layout Date: undated Format: Image Agent: unknown
3. Schematic drawing showing flow with arrows of a specific part with proposed rearrangement. Collection: Early 20th Century Engineering Lantern Slides Set: Plant Layout Date: undated Format: Image Agent: unknown
