What is a 'Scotch Boiler'? I thought scotch boilers were fire-tube, but I just saw a diagram on here that seems to imply a water-tube design. What gives? - Quora
Fire Tube Boiler - Mechanical Engineering
How does a Fire Tube Boiler work?| What are types of Fire Tube Boilers?
Water-tube boiler - Wikipedia
File:Locomotive fire tube boiler schematic (with superheater).png - Wikimedia Commons
Fire Tube Boiler - Construction, Types and Its Working
What Is A Fire-tube Boiler And How Does It Work? | IQ Mech