Scotch marine boiler
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A "Scotch" marine boiler is a design of steam boiler best known for its use on ships.
German example. Note the steam dome, a typically German feature, and also the corrugated furnaces.
Sectional diagram of a "wet back" boiler
Inside the combustion chamber, looking up at the tubeplate
Rear face of the boiler of steam tug Mayflower, showing the stays supporting the combustion chambers
Boiler (power generation)
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A boiler or steam generator is a device used to create steam by applying heat energy to water. Although the definitions are somewhat flexible, it can be said that older steam generators were commonly termed boilers and worked at low to medium pressure but, at pressures above this, it is more usual to speak of a steam generator.
An industrial boiler, originally used for supplying steam to a stationary steam engine
A superheated boiler on a steam locomotive
Large cation/anion ion exchangers used in demineralization of boiler feedwater