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270 the radius of the ship. The reasons that led to the adoption of steam were essentially those which made men cling to the oar as long as possible. Sail replaced the oar because it left room for the weapon: steam came into use because it did not interfere with the use of the weapon. It—or some similar motive power—can remain only so long as no weapon needs the space occupied by it.

It is also possible that this potential weapon will have so great a radius that motive power will become entirely superfluous. Suppose it—as is likely rather than otherwise—to partake of the nature of the vril of the Coming Race. Ships then might become entirely useless for its application, because the ship exists and has always existed only to enable men to reach opponents who were otherwise not to be reached. It has been shown that the radius of activity of warships has increased from a small portion of the world to the entire world, and every increase of speed, by demolishing distance, must now tend to reduce the area of operations. In the past speed increases were met by increasing the area; but the world's limits are now reached. The almost daily increase in the range of artillery is slowly contracting the area. Every increase of speed contracts it. In other words we have reached and passed that limit of geographical expansion which in the past met and neutralised the increase of radius in range of weapons and speed—which are convertible terms. For instance, the galleons at Lepanto already