[Illustration: One of the 'Wooden Walls of Old England.' _The Duke of Wellington_ Screw Line-of-Battle Ship. One hundred and thirty-one Guns.] It would be interesting to glance at some of the principal offensive and defensive capabilities of a modern ironclad. The first-class line-of-battle ship of fifty years ago carried as many as a hundred and thirty, what would be called in the present day, very light guns; in contrast to this, her Majesty's armour-plated barbette ram _Benbow_ carries _two_ guns weighing a hundred and ten tons each. These enormous weapons are forty-three feet eight inches long, and are capable of sending a shot weighing three quarters of a ton to a distance of seven miles. The effect of a shell from one of these guns piercing the armour of a ship and bursting would be very disastrous, and there are few, if any, ships whose armour, when fairly hit at a moderate distance, could withstand such a blow. Guns, however, although terrible in effect, are now supplemented by other and more deadly means of offence. Foremost amongst these stands the Whitehead or Fish Torpedo. This infernal machine can be discharged from tubes in the side of a ship to a distance of a thousand yards under water at a speed of twenty-five miles per hour. Armed with its charge of gun-cotton it rushes forth on its mission; and, if successful in striking the ship against which it is aimed, explodes, and rends a large hole in her side, through which the water pours in huge quantities. In order to protect a man-of-war from this danger, she can be surrounded at short notice with thick wire-nettings, hanging from projecting side-spars, against which the torpedo explodes with harmless effect. These nettings are, however, principally intended for use when ships are at anchor in harbour at night; they could not well be employed in action with an enemy, as they offer such resistance to the water as to reduce the speed of the ship by four or five knots, and so encumber her as to render her liable to be rammed by a more active opponent. All large ironclads now have two or three torpedo boats. These craft are constructed of steel one-sixteenth of an inch thick, and steam at a speed of sixteen knots, some of the larger kind reaching twenty or twenty-one knots an hour. Carrying two Whiteheads, they are valuable auxiliaries to the parent ship; their rapid movements, together with their dangerous freight, distracting the attention of an enemy. [Illustration: The _Majestic_.]