Knowing, then, the interests imperilled, English designers are keen to achieve the best results; and when, as they believe, this has been accomplished, is it a wonder that they fall tooth and nail in a white-heat of positive assertion and flat contradiction upon all who differ from them? All are striving so honestly for the common good of the great country which they love with such intense and insular patriotism that even their imbittered differences of belief command the respect of right-thinking men everywhere. But in these variant faiths where is the truth? The question has run the gamut of experiment without being solved, the pendulum has swung from side to side and found no point of rest, and to-day there is a fixed agreement only as to the dangers which threaten. The most marked tendencies, however, in all modern design are the diminution of side armor, the increase of deck protection, and the development of speed. The public mind is so familiar with the great speed of the large mail-boats that a common question, often put as an inquiry of disparaging comparison, is why war-vessels do not steam as fast. The simplest answer to this is that they do, and in types which, like the big steamers, are special, the boasted achievements have been surpassed. Of course the number of vessels that can make nineteen knots is limited, because the man-of-war is hampered by necessities of space, weight, and safety, which do not obtain with the others. Mr. White, who has been so often, and, it is to be hoped, so advantageously, quoted in this editing, says: “The necessity for giving protection to the engines and boilers of war-ships introduces special restrictions and difficulties in the design which are not known in merchant-ships, wherever in war-ships the overshadowing necessities of fighting power compel the acceptance in many cases of limited space and other inconveniences.... Merchant-steamers of all classes are built and engined for the purpose of steaming continuously at certain maximum speeds, and making fairly uniform passages; they consequently possess a considerable reserve of boiler power to meet adverse conditions of wind and sea. War-ships, on the contrary, ordinarily cruise at very low speeds, and yet must be capable of reaching very high speeds when required in action or chasing. A war-ship, for instance, that attained about sixteen knots on the measured mile, and could steam continuously at sea, as long as her coal lasted, at a speed of about fifteen knots, would ordinarily have to cruise at from nine to ten knots. At this low speed she would require, say, only _one-seventh_ of the indicated horse-power which would be developed at her full sea speed, or say _one-tenth_ of what would be developed on the measured mile. This obviously introduces conditions of a character entirely different from those of the merchant-ship. The war-ship’s machinery must be so designed that the power necessary to give her high speed at long intervals and for