These engines of the _Campania_ work two long propeller-shafts, each carried through an aperture in the stern close to the centre-line, and fitted to a screw. Unlike other twin-screw vessels, the propellers and shafts are, as it were, carried within the hull, and not in separate structures. Abaft of the screws, the rudder is completely submerged, and is a great mass of steel-plating weighing about twenty-four tons. With a straight stem, an elliptic stern, two huge funnels, and a couple of pole-masts--intended more for signalling purposes than for canvas--the _Campania_ looks thoroughly business-like, and has none of the over-elaborated get-up of the _Great Eastern_, with her double system of propulsion and small forest of masts. The bulwarks are close fore and aft; and from the upper deck rise two tiers of houses, the roofs of which form the promenade deck and the shade deck. In the structure of the hull and decks enormous strength has been given, with special protection at vital parts, as the vessel is built in compliance with the Admiralty requirements for armed cruisers. Below the line of vision are four other complete tiers of beams, plated with steel sheathed in wood, on which rest upper, main, lower, and orlop decks. The last is for cargo, refrigerating-chambers, stores, &c.--all the others are devoted to the accommodation of passengers. The _Campania_ is fitted to carry 460 first-class passengers, 280 second-class, and 700 steerage passengers--in all, 1440, besides a crew of 400. She has cargo-space for 1600 tons, which seems a trifle in comparison with her size, but then it is to be remembered that the fuel consumption of those 96 furnaces is enormous, and requires the carrying of a very heavy cargo of coals for internal consumption. [Illustration: The _Campania_.]