In the North Sea fight, according to the report of Admiral Beatty, the British shots began to take effect on the enemy at ten miles, and the whole battle was fought at a range of over seven miles. The German guns, being mounted so that they could be elevated much more than the British, were able to shoot not only as far, but even farther. The British guns, however, were much more effective, because of the greater weight of metal thrown. When projectiles are increased in size the atmospheric resistance at equal velocity increases as the square of the diameter, while the mass increases as the cube of the diameter. Consequently, large projectiles lose less velocity during flight, in proportion to their weight, due to the resistance of the air, than do smaller projectiles. Only within the last few years has rapid-fire with very large guns become possible. Now, however, loading machinery has been so perfected that the limit is no longer that of hand-power. Wherever in nature forces are opposed, there is a tendency toward an equilibrium. There is now a tendency toward the establishment of an equilibrium between the power of offense and the power of defense--between gun-fire and armor-plate. Nevertheless, the mean force of gun-fire remains still far superior to that of armored resistance. The mean armored resistance is now about on a par with that of the moderate caliber guns, as, for example, 6-and 8-inch guns. If there were no larger guns than those of 6-and 8-inch caliber, guns and armor-plate would be about neck and neck in the race. Consequently, we must look to the winning of naval victories by the employment of guns of more than 8-inch caliber. Speed is of such supreme importance in naval engagements that its value should be especially emphasized. Superior speed enables the fleet possessing it to choose its own position, thus determining the range and the direction from which the attack shall be made. If the fleet happens to have guns of larger caliber and longer range than the enemy, it may be important, also, to choose its weather by keeping out of action until it can fight at the maximum range of its own guns. The slow fleet must always fight at a disadvantage. [Illustration: _Fig. 1.--Two fleets, F and S, go into action in parallel lines, the range being chosen by the fleet, F, having ships of greatest speed and guns of longest range._] [Illustration: _Fig. 2.--The faster fleet, F, forges ahead, concentrating the fire of both its front ships on the van ship of the slow fleet, while the rear ship of flee S is thrown out of range and out of action._] [Illustration: _Fig. 3.--The faster fleet, F, bends its course in front of the slower fleet, S, with increased concentration of fire on the leading ships of the latter, throwing its two rear ships out of action._]