The last three or four years have seen the advent of the largest steamers afloat, and before the end of 1910 they will be eclipsed by one of the two steamers, the _Olympic_ and the _Titanic_, now building for the White Star Line by Harland and Wolff at Belfast, which are to be of about 45,000 tons each. At present the largest White Star vessel is the _Adriatic_, launched in September 1906 and placed upon the service to New York in the spring of 1908. This gigantic ship is 709 feet 2 inches in length, 75 feet 6 inches beam, and 52 feet deep, and her displacement is over 40,000 tons. Besides the usual luxurious fittings of the vessel, which are all in accordance with the traditions of the White Star Line--she is in this respect an improved version of all her great predecessors--she has an electric passenger lift giving communication between the various decks, a gymnasium, and a full set of turkish baths besides plunge bath, massage couches, and electric baths. The hull is divided into twelve water-tight compartments, the bulkheads being fitted with doors which can all be closed instantaneously from the bridge if desired, and there are no fewer than nine steel decks. The Inman and International liners _City of New York_ and _City of Paris_, steel twin-screw steamers, were launched in 1888 and 1889. These two steamers marked one of those epochs of complete transformation in type of vessel necessitated by the public demands and rendered possible by the advance of engineering science.[93] They had considerable beam and their subdivision into water-tight compartments was more thorough than in any vessel hitherto built. Another innovation in their construction was the arrangement of fore and aft bulkheads in addition to the transverse bulkheads. Both these ships were of the Inman type with clipper bows and the usual long graceful lines, but they spread less sail than any of their predecessors, being fitted simply with three pole masts carrying fore and aft schooner rig only. The funnels of each boat, which were three in number, were placed between the fore and main masts. Each vessel carried two separate engines built on the three-crank system, and the boilers were constructed to work at the then unusual pressure of 150 lb. to the inch. The rudder was in many respects different from that usually constructed for merchant steamers, and more nearly approximated to the type adopted in the Navy, in which, as a protection against hostile projectiles, the rudder is wholly submerged. This form of rudder was introduced in these two steamships as they were intended to be used as auxiliary cruisers. The rudder itself was constructed on a modification of the balanced system, in which a portion of the rudder is placed forward of the stock. Both these steam-ships made some very rapid passages, the _City of Paris_ in May 1889 bringing down the time of the transatlantic journey to less than six days. These were the