Figure 15.—The “Neptune,” built for the Boston and Worcester in 1847 by Hinkley and Drury. Note the similarity of this engine and the Fury.

Figure 16.—The “Pioneer” as first exhibited in the Arts and Industries building of the Smithsonian Institution prior to restoration of the sandbox. (Smithsonian photo 48069D.)

[BOILER continued]

The steam dome (fig. 18) is located directly over the firebox, inside the cab. It is lagged and jacketed in an identical manner to the boiler. The shell of the dome is of 5/16-inch wrought iron, the top cap is a cast-iron plate which also serves as a manhole cover offering access to the boiler’s interior for inspection and repair.

[Figure 17.]—“Pioneer” locomotive. (Drawing by J. H. White.)