Space does not permit--and to attempt it would be out of place in a book of this character, which does not profess to do more than indicate the general lines upon which the world’s warships have developed--of a detailed account of all the ships which have followed the _Dreadnought_. Some idea of the wonderful progress that has been made may be obtained from a comparison of the _Dreadnought_ herself and one of her latest successors, the battleship _Orion_, in the matter of armament. The _Dreadnought_ could fire on the broadside eight guns of 12-inch calibre, throwing projectiles of 850 lb. weight, her weight of broadside being 6,800 lb. The _Orion_ has ten guns on the broadside having a calibre of 13½ inches, and throwing projectiles of 1,250 lb. in weight, the weight of broadside being 12,500 lb. Now, if we take the ships intended to be able to take their place in the line of battle since 1906, we find the evidence of development to be equally startling. The dimensions of the _Lord Nelson_ and _Agamemnon_ have already been referred to, and are of exceptional interest in this connection as showing the type of vessel the _Dreadnought_ superseded. This vessel herself was exceeded slightly in displacement by the _Bellerophon_, _Temeraire_, and _Superb_, which had sixteen anti-torpedo boat 4-inch guns, as against the twenty-seven 12-pounders of the _Dreadnought_. The _St. Vincent_, completed in 1909, and her sisters the _Vanguard_ and _Collingwood_, completed in 1910, are 500 feet in length by 84 feet beam, and have a displacement of 19,250 tons, and engines of 25,400 h.p.; their armoured belt is 9¾ inches thick amidships, tapering fore and aft to 6½ inches, while the armour of the barbettes is 11 inches in thickness, and the protective deck is 2¾ inches. They have the same number of big guns and torpedo tubes, but the number of the 4-inch anti-torpedo guns was increased to twenty, and they also had six Maxims. In 1911 the _Colossus_, _Hercules_ and _Neptune_ were launched, and showed a very great advance on those immediately before them. Their length was increased to 510 feet, and they were 86 feet in the beam and of 20,250 tons displacement, and their engines developed 25,000 h.p. Their armour was more powerful, as their water-line belt amidships was 10 inches thick, tapering to 8 inches forward and 7 inches aft; their armament was the same. These three ships were given conning towers with 11-inch armour. There were also launched in 1911 the _Orion_, _Thunderer_, _Monarch_, and _Conqueror_, built respectively at Portsmouth, Blackwall, Elswick and Dalmuir. These four vessels are so much larger and heavier than preceding ships of the all-big-gun type that they have been claimed as inaugurating another class. They carry ten 13.5 inch guns, which include the famous “12-inch A,” in five barbettes, all of which are on the centre line of the ship. These four vessels are each 545 feet in length between perpendiculars, and 584 feet over all, and have a