The central compartment contains the machinery,
which consists of a pair of compound surface condensing engines, with
cylinders 11 in. and 20 in. in diameter; the shafting running the
whole length of the vessel, with a propeller at each end. Steam is
generated in a steel boiler of locomotive form, so arranged that the
funnel passes through the deck at the side of the vessel; and it is
designed for a working pressure of 100 lb. per square inch. This
boiler also supplies steam for the small hauling engine fixed on the
bulkhead. Light to this compartment is obtained by means of large side
scuttles along each side of the boat and glass deck lights, and the
iron grating at the entrance near the deck house. This boat was
constructed in six pieces for shipment, and the whole put together in
the builders' yard. The machinery was fixed, and the engine driven by
steam from its own boiler, then the whole was marked and taken
asunder, and shipped to the West Indies, where it was put together and
found to answer the purpose intended.
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