supplying steam to one cylinder; o the feed-pipe to supply boiler with water from tank in tender. In fig. 154 we give the elevation of an American locomotive, with outside cylinders; and in fig. 155 a longitudinal section of the same. сс the fire-box; d d the flue-tubes; ss the smoke-box; ee the conical blast pipe, the opening of which is regulated by the levers as in the drawing; m m the steam-dome; n n the steam-pipe; rr the regulator dome; o the regulator, consisting of a spindle-valve, actuated on by the fig. 156. lever o, admitting steam to the cylinder through the pipe o" o";ll the steam space above the tubes; pp the lock-up spring safety-valve;ƒg the funnel; ii, hh, kk, the "spark-arrester." The curved arrows show the direction of the heated air; the sparks being deposited in the curved vessels ii, the heated air and steam passing out at the vertical apertures k k. The eccentric-rods and gear for working the valves, &c. are shown at b b. In fig. 156 we give a transverse section of same engine at smoke-box end. dd the tubes; e the lever for working the conical blast-tube e e ; o the steam-pipe; of the pipe leading to the cylinders; p p the pipes leading to the blast; g g the cylinders; f the funnel or chimney. In fig. 157 we give the back or fire-box end elevation of the same engine. c c the fire-door; d d the starting handles and levers for working the eccentric motions, &c. &c. ; e e the gauge-cocks; ff the spring-balance safety-valve; hg the steam-whistle, actuated by the lever i; mm the crankpins, on the driving-wheels, to which the connecting-rods are attached; i i the house or covering for sheltering the engine-men (this arrangement is adopted in all the engines working in the Northern States of America, the climate being too severe in winter to allow the men to be exposed to all weathers, as with us). In fig. 158 we give an elevation of another form of American locomotive aa the cylinder and valve-casing; b the piston cross-head; c the connecting-rod; d d the connecting-rod coupling the wheels together. In fig. 159 we give a sketch of a first-class locomotive passenger engine on Crampton's patent principle, as used on the London and Northern and |