1. Typical losses in an oil-fired marine boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
2. Diagram showing effect of boiler pressure upon boiler efficiency Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3. Diagram showing effect of feed water boiler temperature upon boiler efficiency Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
