These are Dreadnought battleships with a displacement of 19,250 tons. They are 500 ft. long, and have Parsons’ turbines of 24,500 h.p., which give them a top speed of 21 knots. Their main battery comprises ten 12-in. guns of powerful type, mounted in five twin turrets, the disposition of which allows eight guns to be used on either beam. They also carry eighteen 4-in. quick-firers, some mounted on top of the turrets, and others in the superstructure. There are three submerged torpedo tubes. The waterline is protected by armour barely 10-in. thick, this being also the thickness of the turret armour. Coal and oil to the amount of 2,700 tons can be carried. The complement of these battleships numbers rather more than 800 officers and men. They cost about £1,700,000 to build and complete. BELLEROPHON CLASS. (Completed 1909.) BELLEROPHON. SUPERB. TEMERAIRE. These ships are some of our earliest Dreadnoughts. Their displacement is 18,900 tons, length 490 ft. Parsons’ turbines of 23,000 h.p. propel them at a maximum speed of 21 knots, which they can maintain for several hours without difficulty. Ten 12-in. guns form the primary armament, which is mounted in five twin turrets, so disposed as to allow eight guns to fire on the broadside. They carry, further, sixteen 4-in. quick-firing guns to repel attack by torpedo craft, and there are three torpedo tubes below water. On the waterline and the big-gun positions there is 11-in. armour. The maximum supply of coal and oil is 2,700 tons. The complement is 800 officers and men. These battleships cost about £1,700,000 to build and complete. DREADNOUGHT. (Completed 1906.) This famous battleship was laid down at Portsmouth in October, 1905, and completed by December, 1906, and thus established a record for speedy construction. She was designed by a committee of experts to meet the requirements of modern naval tactics, and with various modifications the main principles she embodied have since been almost universally adopted. She displaces 17,900 tons, and is 520 ft. long. Parsons’ turbines of 23,000 h.p. give her a speed of 21 knots. She was the first battleship ever fitted with turbine machinery. The armament consists of ten 12-in. guns, mounted in five twin turrets, which are so placed as to give a broadside fire of eight and an axial fire of six guns. For keeping off torpedo craft a battery of twenty-four 12-pounder quick-firers is provided. There are five submerged torpedo tubes. Waterline and vitals are protected by 11-in. armour, as also are the gun turrets. The ship has a great amount of internal protection against mine or torpedo explosion. She can carry 2,700 tons of coal. The complement numbers about 800 officers and men. This battleship cost upwards of £1,800,000 to build and equip. LORD NELSON CLASS. (Completed 1908-09.) LORD NELSON. AGAMEMNON.