Sectional view of a typical British passenger locomotive. A) Fire-box shell; B) Internal fire-box; C) Grate or fire-bars; D) Ash-pan; E) Cylindrical part of boiler; F) Flume-tubes; G) Smoke-box; H) Chimney; I) Steam-dome; J) Steam-chimney; K) Steam-pipe; L) Valve-chest of cylinder; M) Steam-cylinder (not seen); N) Exhaust and blast pipe; O) Slide-valve; P) Piston-rod (not seen); Q) Connecting-rod; R) Driving-crank; S) Driving or crank axle; T) Fore-axle; U) Hind-axle; V) Inside framing; W) Outside framing; X) Foot-plate; Y) Draw-plates; Z) Buffer-beam; a) Fire-door; b) Draught-regulator or ash-pan damper; c) Stays binding fire-box shell; d) Stays supporting fire-box roof; e) Stays binding crown to fire-box roof; f) Stays binding fire-box to smoke box; g) Smoke-box door with closing handle; h) safety-valve; i) Water-gauge and cocks (not seen); j) Water-heating cock; K) Steam-whistle; l) Water blow-off cock (not see