The annual slaughter from typhus far exceeds that of war; but right drainage destroys typhus. The plague in the sea-service from scurvy is healed by lemon juice and other diets portable or procurable; the depopulation by cholera and small-pox is ended by drainage and vaccination; and every other pest is not less in the chain of cause and effect, and may be fought off. And, whilst art draws out the venom, it commonly extorts some benefits from the vanquished enemy. The mischievous torrent is taught to drudge for man; the wild beasts he makes useful for food, or dress, or labor; the chemic explosions are controlled like his watch. These are now the steeds on which he rides. Man moves in all modes, by legs of horses, by wings of wind, by steam, by gas of balloon, by electricity, and stands on tiptoe threatening to hunt the eagle in his own element. There is nothing he will not make his carrier. Steam was, till the other day, the devil which we dreaded. Every pot made by any human potter or brazier had a hole in its cover, to let off the enemy, lest he should lift pot and roof, and carry the house away. But the Marquis of Worcester, Watt, and Fulton bethought themselves that where was power was not devil, but was God; that it must be availed of, and not by any means let off and wasted. Could he lift pots and roofs and houses so handily? he was the workman they were in search of. He could be used to lift away, chain, and compel other devils, far more reluctant and dangerous, namely, cubic miles of earth, mountains, weight or resistance of water, machinery, and the labors of all men in the world; and time he shall lengthen, and shorten space. It has not fared much otherwise with higher kinds of steam. The opinion of the million was the terror of the world, and it was attempted, either to dissipate it, by amusing nations, or to pile it over with strata of society--a layer of soldiers; over that, a layer of lords; and a king on the top; with clamps and hoops of castles, garrisons, and police. But, sometimes, the religious principle would get in, and burst the hoops, and rive every mountain laid on top of it. The Fultons and Watts of politics, believing in unity, saw that it was a power, and, by satisfying it (as justice satisfies everybody), through a different disposition of society,--grouping it on a level, instead of piling it into a mountain,--they have contrived to make of this terror the most harmless and energetic form of a State.