1. Comparison of 2 stud tube division walls - single vs double uptake divided furnace boilers Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
2. Water wall - sheet box side of a boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
3. Yarrow boiler with superheater, section of Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
4. Steam boiler showing steam and water from risers Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
5. 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
6. Gauge showing steam vs water in boiler Collection: Early 20th Century Engineering Lantern Slides Set: Machinery Date: undated Format: Image Agent: unknown
