Example image of eyePlorer eyePlorer map for 'Fire-tube boiler': Boiler Conduction (heat) Steam Water-tube boiler Cylinder (geometry) Pressure vessel Steam locomotive Riverboat The African Queen Steam donkey Firebox (steam engine) Superheater Steam engine Steam turbine Chimney George Stephenson Stephenson's Rocket Vacuum Prime mover (locomotive) Richard Trevithick Thomas Newcomen Brick Furnace William Fairbairn Steamboat Smokebox Blastpipe Portable engine Steamroller Traction engine Steam wagon Truck Great Western Railway London, Midland and Scottish Railway Thermic siphon BLEVE Boiler explosion Fusible plug Safety valve Stanley Motor Carriage Company Injector Sight glass Fouling Asbestos Lead Annealing (metallurgy) Work hardening Thermal insulation Draft (boiler) Locomotive frame