German and British rivalry in the production of faster destroyers and torpedo boats has resulted in the production of two types, each peculiarly suitable to the country to which it belongs; the British vessels have been designed rather for the offensive, on the principle perhaps that the truest defence is the swiftest attack, while the German boats have become torpedo boats rather than destroyers, and though capable of performing the duties of both roles, are considered by British experts to be less destroyers than the British boats, which are admittedly destroyers first and torpedo boats afterwards. By 1909 the tonnage of the British destroyers had reached 950 tons, the speed being 27 knots. In that year, too, the Admiralty standardised its vessels instead of leaving the contractors to design their own craft. Oil fuel was tried in the small boats of these classes in the British Navy in 1904 and for three years subsequently, but was dropped, only to be taken up again in 1909, in which year Germany also experimented in this direction. The armament of the British and German ships shows that the destroyers of the latter are meant to be torpedo boat destroyers, though it is contended that they could be more heavily and effectively armed still than they are without interfering with their sea-going qualities and speed. The British boats have probably the greater gun power, while the German torpedo boats have the better torpedo power. The scouts were a class introduced early in the present century, intended to combine the advantages of a fast gunboat with the speed of a small cruiser and the activity of a commerce destroyer. One of the best examples is the _Adventure_, launched in 1904, of 2,940 tons, whose engines of close upon 16,000 h.p. under forced draught give her a speed of 25.4 knots. She is, moreover, powerfully armed for a vessel of her lightness and speed, as she has ten 12-pounders and eight 3-pounders. The Americans in 1907 brought out the remarkable scout cruiser _Salem_, built by the Fore River Company. She was a 24-knot vessel, and though only of 4,640 tons displacement fully loaded, was given a freeboard of 34 feet at the stem, 19 feet 8¼ inches amidships, and 21 feet 6 inches at the stern, or higher than that of any vessel then in the American navy, in order to give her excellent seagoing qualities in all weathers, and a wide range of stability. She was built of steel throughout, carried two torpedo tubes, and is heavily armed. The crushing defeat of the Russians by the Japanese in both the naval engagements of the war was brought about by the superior long-range firing of the Japanese, whose big guns played havoc with the Russian vessels.