13. Diagram showing effect of boiler pressure upon boiler efficiency Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
14. 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
15. Steam boiler showing water level, generator, 4 ply metal bellows, and feed water regulator valve Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
16. Gauge showing steam vs water in boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
17. Large Tube Yarrow boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: 1903 Format: Image Agent: unknown
18. Boiler Tubes from a Thornycroft Boiler, used in torpedo boats Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Location: Possibly photographed at Cavite Navy Yard, Philippine Islands Date: undated Format: Image Agent: unknown
19. Babock & Wilcox express double type furnace boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Location: unknown Date: undated Format: Image Agent: unknown
20. Thornycroft boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
21. Water-tube boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
22. Yarrow steam boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Location: unknown Date: undated Format: Image Agent: unknown
23. Yarrow steam boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Location: unknown Date: undated Format: Image
24. Yarrow steam boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Location: unknown Date: undated Format: Image
