extenso, has of late years been improved for man's behoof, only two forces being taken advantage of,—the gravity of the horse, which is the centripetal, and his centrifugal inclination to go ahead. Only these two elements in the calculation. And is not the creature's whole economy better economized thus? Are not all finite beings better pleased with motions relative than absolute? And what is the great globe itself but such a wheel,—a larger treadmill,—so that our horse's freest steps over prairies are oftentimes balked and rendered of no avail by the earth's motion on its axis? But here he is the central agent and motive-power; and, for variety of scenery, being provided with a window in front, do not the ever-varying activity and fluctuating energy of the creature himself work the effect of the most varied scenery on a country road? It must be confessed that horses at present work too exclusively for men, rarely men for horses; and the brute degenerates in man's society.
It will be seen that we contemplate a time when man's will shall be law to the physical world, and he shall no longer be deterred by such abstractions as time and space, height and depth, weight and hardness, but shall indeed be the lord of creation. "Well," says the faith-
