“Pioneer” locomotive,
(1) Safety valve,
(2) spring balance,
(3) steam jet
(4) dry pipe
(5) throttle lever
(6) throttle
(7) crown bar
(8) front tube sheet
(9) check valve
(10) top rail
(11) rear-boiler bracket
(12) pedestal
(13) rocker bearing
(14) damper
(15) grate
(16) bottom rail
(17) pump heater valve
(18) cylinder lubricator
(19) reversing lever
(20) brake shoe
(21) mud ring
(22) blowoff cock
(23) ashpan

(Drawing by J. H. White.)